AfricaSaint-DenisReunion eSIM and Travel Guide: Stay Connected in the Cirques and on the Volcano
Reunion is a French overseas territory in the Indian Ocean with excellent coastal and urban 4G from Orange Reunion and SFR, and growing 5G in the main towns. The volcanic interior, the three dramatic Cirques of Mafate, Cilaos and Salazie, and summit trails above 2,000 m have limited to no signal. A Roamix Reunion eSIM connects you to the best available network on arrival at Roland Garros Airport and benefits most visitors who are not on a French or EU plan that roams free. Note that shark risk restricts swimming to lagoon-protected beaches on the west coast only.
Key Takeaways
- Orange Reunion leads in 5G coverage and widest coastal reach; SFR Reunion is a strong 4G alternative.
- A Roamix eSIM activates on arrival at Roland Garros Airport and connects to the best available local network.
- The Cirque de Mafate is entirely off-grid and accessible only on foot or by helicopter; Cilaos and Salazie have limited signal.
- Swimming is restricted to lagoon-protected beaches on the west coast due to shark risk; the east and south coasts are unsuitable for ocean swimming.
- Reunion uses the euro and applies French regulations; it is not an EU member for roaming purposes, so most EU SIMs are billed as outside the EU.
Quick Facts
Reunion Connectivity
Get a Roamix Reunion eSIM and land connected at Saint-Denis Roland Garros Airport.
How to Stay Connected in Reunion
International hotels in Saint-Denis and west coast resorts offer good wifi. Mountain refuges in the Cirques have no wifi or a very basic satellite connection at extra cost. The Cirque de Mafate refuges have no connectivity of any kind.
Option
Best For
Notes
RecommendedRoamix eSIM
Most international visitors outside French carrier coverage
Instant activation at Roland Garros, connects to Orange Reunion or SFR for the best available signal. Particularly useful for visitors on non-French plans.
French carrier roaming (Orange, SFR, Bouygues, Free)
French residents on inclusive packages
Some French metropolitan carriers include Reunion in their national data package. Verify with your French operator before relying on this.
Local physical SIM
Long stays needing a local number
Available at Orange and SFR shops in Saint-Denis and Saint-Pierre. Requires identification.
Carrier roaming (non-French international)
Very short trips
Most European and non-French carriers bill Reunion as 'rest of world' rather than EU, which can be expensive. A Roamix plan is more economical for any stay beyond a couple of days.
For most international visitors to Reunion, a Roamix eSIM is the most cost-effective option, with local network speeds along the coast and towns without the 'rest of world' roaming surcharges that most European carriers apply.
Get connected the moment you land in Reunion.
Get your Reunion eSIMMobile Networks in Reunion
Reunion has two main operators, Orange Reunion and SFR Reunion, both offering 4G LTE along the coast and in all main towns, with 5G expanding in Saint-Denis, Saint-Pierre, Saint-Gilles and Les Avirons. The volcanic interior including the Piton des Neiges summit approaches, the three Cirques and the high lava plains around Piton de la Fournaise have patchy to no signal. A Roamix Reunion eSIM connects to the strongest available network on arrival at Roland Garros, especially useful for visitors on non-French plans, as Reunion's status as a French overseas territory (and not an EU member) means most EU SIMs charge 'rest of world' rates rather than EU Roam Like At Home rates.
Largest operator on the island with the widest 5G coverage along the west coast and best reach into the interior valleys including Cilaos and Salazie. Best overall choice for island coverage.
Strong 4G and growing 5G on the west and south coasts. Good coverage in Saint-Pierre and the south coast towns. Competitive for urban data speeds.
Growing presence on the island using Orange infrastructure. Competitive pricing for local users but more limited coverage than the two main operators.
Local operator serving the island with 4G in main towns. Used primarily by local residents.
Typical Speeds
5G in coastal urban areas delivers 50 to 200 Mbps. Coastal 4G runs 20 to 60 Mbps in town areas. Interior valleys get slower 4G or 3G.
5G Status
5G is live with Orange Reunion and SFR along the west coast from Saint-Denis south through Saint-Paul, Saint-Gilles and Saint-Pierre. Interior towns have 4G.
For the coastal circuit from Saint-Denis to Saint-Pierre, Orange gives the best coverage. For hiking in Cilaos or Salazie, ensure you download all trail maps, mountain refuge contacts and emergency numbers over Roamix data before entering the Cirque. For Mafate, treat it as entirely off-grid.
The Cirque de Mafate is entirely off-grid, accessible only on foot via mountain passes or by helicopter. The Cirques of Cilaos and Salazie have limited signal in the main villages. Piton de la Fournaise summit trails above the Pas de Bellecombe viewpoint can be patchy. The uninhabited Plaine des Sables lava desert has no signal.
Reunion's networks use standard French LTE and 5G bands. Any eSIM-capable unlocked smartphone works without band compatibility concerns.
Data Usage Guide
Data needs in Reunion are moderate for coastal tourism and high for safety-critical mountain activities. Front-load all trail information, refuge contacts and emergency numbers before entering any cirque.
Download the Rando Reunion offline trail pack for the GRR network before any multi-day hike. The Mafate cirque has zero signal for its entire duration; complete all logistics in Cilaos, Hell-Bourg or the cirque entry points.
Data by Activity
Light Use
3 to 5 GB
One week west coast beach and Saint-Denis cultural trip
Coastal navigation, restaurant bookings, beach activity reservations and social uploads in a well-covered coastal area.
Standard
6 to 10 GB
Two week hiking circuit including the Cirques
Large offline trail downloads, refuge bookings, volcano eruption watch and communication at points with signal.
Heavy Use
20 GB or more
Remote work base in Saint-Denis
Video calls, tethering and uploads on Reunion's strong 5G, combined with beach and hiking activities.
Apps & Internet Freedom
Reunion has a fully open internet with no restrictions on any platform. All mainstream apps work normally on a Roamix eSIM.
There are no internet restrictions in Reunion. French telecommunications law applies and all platforms are freely accessible.
Works fully for messaging and calls; widely used alongside French SMS.
Google Maps
No restrictions; download offline Reunion island map including the interior cirques before hiking.
FaceTime
Works normally over data and wifi.
Social media
Instagram, Facebook, TikTok and X all work without restriction.
How to Set Up a Reunion eSIM
Install your Roamix Reunion eSIM over wifi before departure. It activates automatically when your phone connects to a Reunion network on arrival at Roland Garros Airport, so you land already online.
Works on eSIM capable devices including iPhone XS and newer, Google Pixel 3 and newer, and recent Samsung Galaxy models. Your phone must be carrier unlocked.
- 1
Buy your plan on the Roamix Reunion eSIM page before departure.
- 2
Scan the QR code or tap to install the eSIM over wifi at home.
- 3
Label it Roamix and set your home SIM as primary for calls and texts.
- 4
Enable data roaming for the Roamix line only.
- 5
Land in Saint-Denis and the eSIM connects automatically to Orange Reunion or SFR.
APN Note
Roamix sets the correct APN automatically. If data does not start after landing, enter the APN from your activation email and toggle airplane mode off and on.
Troubleshooting
No data on arrival usually means data roaming is off for the Roamix profile. Enable roaming in mobile settings and restart if needed.
Get connected the moment you land in Reunion.
Get your Reunion eSIMArrival Checklist
Confirm your Roamix eSIM has connected to a local network before leaving the arrivals hall at Roland Garros Airport in Saint-Denis.
Download the Reunion IGN hiking trail map app or offline trail packs before leaving the airport wifi zone.
Note that Reunion uses UTC+4 time (4 hours ahead of France in winter, 3 hours in summer); update your phone timezone.
Check the current shark risk bulletins at Observatoire des Requins de La Reunion (OPR) if you plan to swim; the west coast lagoons are the only safe swimming areas.
Withdraw euros at an airport ATM; cards are widely accepted but some mountain refuges and small Cirque vendors are cash-only.
How locals communicate
French SMS and WhatsApp are both widely used in Reunion. Reunion Creole is the everyday spoken language but all written and digital communication uses French. Facebook Messenger is popular among local communities.
Keep your home SIM active for SMS two-factor authentication while using your Roamix line for data. The emergency number 112 works on any SIM with network access.
Airports in Reunion
Roland Garros Airport
Saint-Denis
Free wifi available in the terminal. The airport is on the north coast 12 km east of Saint-Denis, the main gateway for long-haul flights from Paris and regional connections.
With Roamix data active on arrival, book your rental car shuttle or taxi to Saint-Denis and download the Reunion island hiking trail map before leaving the terminal.
Pierrefonds Airport
Saint-Pierre
Limited wifi at this smaller airport on the south coast. Pierrefonds serves domestic and regional flights to Mayotte and other Indian Ocean islands.
Pierrefonds is the gateway to Piton de la Fournaise and the south coast. Use Roamix data to confirm your rental car booking and download the volcano eruption watch app before landing.
Visa & Entry for Reunion
Reunion is a French overseas territory and region, so entry is subject to French and Schengen immigration rules. EU citizens travel freely. Citizens of the United States, Canada, the United Kingdom, Australia and most other Western countries enter visa-free for up to 90 days as they would enter France. Note that Reunion's status means standard Schengen rules apply, not a separate Reunion visa.
eVisa / ETA
No eVisa or ETIAS is required for most nationalities as of 2026. Check the current ETIAS rollout status before travel, as it was not yet mandatory for all eligible nationalities at the time of this guide.
Passport validity
Your passport must be valid for at least 3 months beyond your intended stay in Reunion.
Onward ticket
Proof of onward travel and sufficient funds may be requested at immigration, in line with standard French entry requirements.
Keep digital copies of your return flight and accommodation confirmation accessible on your Roamix eSIM for immigration if requested.
Entry requirements are subject to French immigration law. Verify at the French Consulate or france-visas.gouv.fr before travel.
Get connected the moment you land in Reunion.
Get your Reunion eSIMMoney & Payments in Reunion
Reunion uses the euro, which is the practical benefit of its French overseas territory status. No currency exchange is needed for eurozone visitors. Cards are widely accepted across the island.
Cash vs Card
Cards are accepted at supermarkets, hotels, restaurants and most shops across the island. Mountain refuges in the Cirques and small rural vendors are cash-only. Carry some euro coins and notes for market stalls and trail refreshment points.
ATMs
ATMs are widely available at banks and supermarkets across the main coastal towns. ATMs become rare in the Cirques; withdraw cash in Cilaos or Salazie town before any hike.
Payment Apps
Apple Pay and Google Pay are accepted at most modern retail outlets. French payment norms apply throughout the island.
Daily Budget
Reunion is priced at French metropolitan levels. Mid-range dining costs EUR 15 to 30 per person, hotel rates EUR 80 to 180 per night. Mountain refuges in the Cirques cost EUR 18 to 25 per person for a dormitory bunk and dinner.
Data cost: International carrier roaming billed as 'rest of world' for Reunion can cost EUR 5 to 10 per day. A Roamix plan covers an entire two-week trip for less.
Getting Around Reunion
Getting around Reunion requires a rental car for almost everything beyond Saint-Denis. The island's mountain roads and hairpin coastal routes are spectacular but demanding. Public buses (Car Jaune) connect main coastal towns.
Rental car
Essential for exploring Reunion beyond Saint-Denis. The Route du Volcan, the Cirque de Cilaos hairpin road (430 bends) and the south coast Route de la Montagne all require a car. Use Google Maps for navigation on main roads and download offline Reunion maps for interior routes.
Car Jaune public buses
Reunion's public bus network connects Saint-Denis to Saint-Pierre and main coastal towns. Services are infrequent and not suitable for the cirques. Use the Car Jaune app or website to plan routes over Roamix data.
Hiking and foot trails (GRR)
Reunion's Grande Randonnee Reunionnaise (GRR) trail network is world-class. The GRR1 traverses the island including the Cirques. Signal is available at trailheads in towns but disappears in the Cirques. Download the Rando Reunion or Wikiloc offline trail packs before every hike.
Helicopter tours
The most spectacular way to see the Cirques and the active crater of Piton de la Fournaise, especially during eruptions. Book helicopter tours through Saint-Denis operators. Use Roamix data to check eruption status and confirm flight availability.
Regions & Travel
Reunion rewards visitors with volcanic drama unlike anywhere else in the Indian Ocean: three deeply eroded calderas, an actively erupting shield volcano at Piton de la Fournaise, a 3,069 m extinct volcano at Piton des Neiges and a beach culture concentrated on the protected west coast lagoon. Connectivity keeps you connected in coastal towns and provides essential safety communication for mountain trails.
Best time to visit: April to November is the dry season and best for hiking, beach weather and Piton de la Fournaise visits. December to March is the hot and wet austral summer with cyclone risk; some trails close. August is peak tourist season.
Saint-Denis and the North Coast
Reunion's capital and main city, where the Prefecture building and covered market anchor the city center, the colorful Hindu temples and mosques reflect the island's multicultural heritage, and the Jardin de l'Etat's botanical collection provides a green escape. Roland Garros Airport is 12 km east.
Signal: Best connectivity on the island. Excellent 5G across Saint-Denis city center, the seafront and the airport corridor. Orange and SFR both deliver strong signals.
West Coast Lagoons (Saint-Gilles and L'Hermitage)
Reunion's tourist coast, a 25 km stretch of white sand beach protected by the island's coral reef, where the resorts of Saint-Gilles-les-Bains and L'Hermitage-les-Bains provide the island's only shark-safe swimming. The reef creates a lagoon of calm turquoise water behind it.
Signal: Strong 5G and 4G along the entire west coast resort strip from La Saline to Boucan Canot. Signal is consistent on the beach and in the resort hotels.
The Three Cirques (Mafate, Cilaos, Salazie)
The three calderas formed by the collapse of Piton des Neiges offer the most dramatic hiking on the island. Cilaos is accessible by a spectacular hairpin mountain road and is famous for its wine, lentils and thermal springs. Salazie has the stunning Cascade du Voile de la Mariee waterfall. Mafate is entirely car-free, with no road access, reached only on foot over mountain passes.
Signal: Cilaos village has limited 4G. Salazie village has moderate signal. The Cirque de Mafate is entirely off-grid; there is no mobile coverage of any kind in the roadless interior. Download all maps and refuge details before entering any cirque.
Piton de la Fournaise and the South
The world's most active volcanoes measured by frequency, Piton de la Fournaise erupts several times a year, with lava flows visible from the Pas de Bellecombe viewpoint. The south coast town of Saint-Pierre is the second city, and the wild south coast road runs through black lava fields to the pointe of the Bois Blanc.
Signal: Good 4G in Saint-Pierre and along the Route du Volcan. Signal weakens significantly on the Plaine des Cafres plateau and drops on the summit calderas and lava plains. Download the eruption watch app before hiking.
Wild South and East Coast
Reunion's least-visited coast, where dramatic waterfalls including the Cascade de Grand Galet (Langevin) plunge through black lava gorges, sugar cane fields run down to black sand beaches, and the Wild South Reserve protects endemic cloud forest and the Grande Anse beach.
Signal: Moderate 4G in main east coast towns including Saint-Benoit and Saint-Philippe. The Plaine des Palmistes plateau and Takamaka gorge have limited signal.
Hidden Gems
Cirque de Mafate
natural landmarkCirques (interior)
A UNESCO World Heritage site within the Pitons, Cirques and Remparts inscription, this extinct volcanic caldera is the only permanently inhabited roadless area in France, where a handful of isolated villages are accessible only by hiking trails and linked by helicopter for emergencies.
Signal: No mobile coverage anywhere in the Cirque de Mafate. The only access is on foot over the Maido, Cayenne or Col des Boeufs passes, or by helicopter. Complete all logistics over Roamix data in Saint-Denis or Cilaos before entering.
Book mountain refuge beds (gites) well in advance, especially for weekends, as Mafate refuges are limited. Confirm all bookings, download offline maps and save emergency contacts over Roamix data in Saint-Denis before crossing the caldera rim.
Piton de la Fournaise Active Crater
natural landmarkSouth (Piton de la Fournaise)
One of the world's most accessible and most frequently erupting volcanoes, where the 2.6 km descent to the caldera floor and the 3 km hike to the summit crater puts you on the rim of an active lava shield that erupts several times per year.
Signal: Limited signal at the Pas de Bellecombe viewpoint. No signal on the caldera floor or at the summit crater. Check eruption status over Roamix data before driving the Route du Volcan; the road closes during eruptions.
Eruption status changes rapidly and the Route du Volcan closes with little notice. Check the OVPF eruption bulletin over Roamix data that morning, download the trail map and save the rescue number before leaving Saint-Pierre or Cilaos.
Piton des Neiges Summit
natural landmarkCirques (interior)
The highest peak in the Indian Ocean at 3,069 m and the highest point in France outside mainland Europe, an overnight hike from Cilaos reaching the summit for sunrise, with views over all three Cirques, Piton de la Fournaise and the Indian Ocean.
Signal: No signal above the Cilaos trailhead area. The summit at 3,069 m is entirely off-grid. Book refuge de Caverne Dufour from Cilaos over Roamix data before beginning the overnight ascent.
The summit refuge (Caverne Dufour) has very limited bunks and books out weeks ahead. Reserve over Roamix data in Cilaos at least a week before your planned ascent and download the offline summit trail.
L'Hermitage Reef and Lagoon
marine reserveWest Coast
Reunion's main barrier reef at L'Hermitage-les-Bains protects the largest and most species-rich lagoon on the island, where snorkeling reveals dense fish populations, sea turtles, rays and occasional reef sharks within the protected marine reserve just meters from the beach.
Signal: Strong 5G on the beach and in the L'Hermitage resort area. Underwater obviously has no signal; download your dive or snorkel guide before entering the water.
Sea conditions and marine reserve access sometimes change with weather. Check the OPR shark bulletin and marine reserve conditions over Roamix data before any water activity, and book snorkel or dive equipment from L'Hermitage operators in advance.
Cascade du Voile de la Mariee
natural landmarkCirque de Salazie
Reunion's most photographed natural landmark, a bridal veil waterfall plunging from the rim of the Salazie cirque directly visible from the main road through the cirque entrance, set against a backdrop of dramatic volcanic rock walls often cloaked in cloud.
Signal: Limited 4G in Hell-Bourg village in Salazie. The waterfall viewpoint on the RN2 road into the cirque has moderate signal.
The Salazie cirque road is narrow and prone to closure after heavy rain when rockfalls occur. Check road conditions over Roamix data in Saint-Denis before driving and download the Salazie offline map.
Cascade de Grand Galet (Langevin Falls)
natural landmarkWild South and East
A spectacular series of waterfalls tumbling through a black lava gorge on the Langevin River in the wild south, where the river pools are popular for swimming in the upper canyon sections away from the shark-unsafe coast.
Signal: Moderate 4G along the Langevin River valley. The canyon walls can weaken signal on some sections.
The Langevin valley draws crowds on weekends. Use Roamix data to check road conditions and download the walking trail between the various falls before arriving.
Plaine des Sables (Lava Desert)
natural landmarkSouth (Piton de la Fournaise)
A vast red and black cinder desert at 2,200 m on the high volcano plateau of Reunion, where the eerie Martian landscape of ancient lava flows and cinder cones stretches to the horizon, the most visually alien landscape on the island.
Signal: No signal on the Plaine des Sables plateau. Download maps and the Route du Volcan directions before leaving the covered 4G zone on the approach road.
The road to Plaine des Sables closes during eruptions and after heavy rain. Check Route du Volcan status over Roamix data and download offline GPS coordinates before driving up.
Belouve Fern Forest
natural landmarkWild South and East
A primeval cloud forest on the Plaine des Palmistes plateau where giant tree ferns create a prehistoric canopy in the humid mountain interior, accessible via a trail from the Belouve forest gite, with views into the Takamaka gorge below.
Signal: Limited signal on the Plaine des Palmistes plateau. The fern forest itself is off-grid. Download the trail map in Saint-Denis before the drive east.
Book the Belouve forest gite over Roamix data in Saint-Denis before making the drive; the plateau is one of the wettest spots on the island and accommodation fills on good weather weekends.
Cilaos Thermal Springs
wellness siteCirque de Cilaos
The thermal bath complex in the cirque village of Cilaos, fed by volcanic mineral springs, is the only thermal spa on the island, offering hydrotherapy treatments in a stunning cirque setting after a demanding hike. The village also produces Reunion's only wine.
Signal: Limited 4G in Cilaos village. Download the cirque driving route before entering; the 430-hairpin road from Saint-Louis has partial signal.
The Cilaos Thermales spa requires advance booking, especially on weekends. Reserve over Roamix data from Saint-Denis before driving the extraordinary 52 km mountain road into the cirque.
Piton Maido Viewpoint
natural landmarkWest Coast
Arguably the most dramatic viewpoint in the Indian Ocean, a 2,205 m summit on the western rim of the Cirque de Mafate overlooking the entire roadless caldera below, with the Indian Ocean behind and the peaks of the three Cirques ahead, accessible by car or by a demanding trail from Le Guillaume.
Signal: Limited signal at Piton Maido summit viewpoint at 2,205 m. Good 4G in Saint-Paul at the start of the mountain road.
The road to Maido is narrow and shares traffic with hikers; arrive early on weekdays. Download the Mafate viewpoint map over Roamix data in Saint-Paul and confirm the road is open before the ascent.
Events & Best Seasons
Grand Raid de La Reunion (Diagonale des Fous)
sportsIsland-wide (Saint-Pierre to Saint-Denis) · October, four days
One of the world's hardest and most celebrated ultra-trail races, covering 170 km and 10,000 m of elevation gain across Reunion's volcanic peaks, Cirques and remote trails from Saint-Pierre to Saint-Denis. Thousands of runners from around the world compete across the Grand Raid, Trail de Bourbon and Mascareignes formats.
Network note
The Grand Raid is the biggest annual event in Reunion; the entire island participates as spectators. Book accommodation months ahead. Signal is strong at start and finish but absent along the cirque sections.
Roamix tip
Grand Raid week fills every hotel on the island. Book accommodation in Saint-Denis or Saint-Pierre at least three to four months ahead. Use Roamix data to follow live runner tracking and find spectator points on the route.
Sakifo Musik Festival
FestivalSaint-Pierre · June, three days
Reunion's largest music festival, held on the south coast waterfront of Saint-Pierre, with international headliners across rock, reggae, maloya and electronic music sharing stages with major Indian Ocean and African artists.
Network note
Strong 4G and 5G in Saint-Pierre. Festival crowds are large; book accommodation months ahead and expect higher than usual mobile demand on show nights.
Roamix tip
Buy Sakifo tickets online well before the festival. Use Roamix data to check the artist lineup and find the festival site transport options from Saint-Denis.
Dipavali (Diwali)
CulturalSaint-Denis, Saint-Pierre and Tamil neighborhoods · October or November (date varies by Hindu calendar)
The Hindu festival of lights, celebrated with particular fervor in Reunion's Tamil Hindu community, the largest in France, with firewalking ceremonies at Tamil temples across the island and public illumination of the Saint-Denis waterfront.
Network note
Good 5G in Saint-Denis and Saint-Pierre for the main Dipavali celebrations. Temple events and firewalking draw large crowds.
Roamix tip
Dipavali dates shift by the Hindu calendar; confirm the exact date over Roamix data before traveling. Ask at your hotel for the nearest Tamil temple firewalking ceremony, which is open to respectful visitors.
Fete du Safran (Saffron Festival) Cilaos
food and drinkCilaos · May
A festival in the Cirque de Cilaos celebrating the local harvest of lentilles du Cilaos, the island's celebrated lentil variety, and Cilaos wine, with tastings, market stalls and traditional music in the spectacular cirque setting.
Network note
Limited 4G in Cilaos village during the festival. Download the cirque road map in Saint-Denis before the drive.
Roamix tip
The Cilaos festival fills village accommodation; book the Cilaos gites and hotels over Roamix data at least a month ahead. Download offline maps before the 430-hairpin road from Saint-Louis.
Abolition of Slavery Day
CulturalSaint-Denis and island-wide · December 20
The commemoration of the abolition of slavery in Reunion on December 20, 1848, a major public holiday on the island with concerts of maloya music (a UNESCO Intangible Heritage genre), street processions and official ceremonies at the Prefecture.
Network note
Strong 5G in Saint-Denis for the main events. Streets are quiet in the morning for official ceremonies and fill in the afternoon for concerts.
Roamix tip
December 20 is a major public holiday; book restaurants and activities in advance. Use Roamix data to find the maloya concert venues in Saint-Denis for the evening celebrations.
Zembrocal Cultural Festival
CulturalSaint-Denis · September
A major multi-cultural festival in Saint-Denis celebrating the diverse origins of Reunionnais society, with performances of maloya, sega, maloye and Indian classical dance, food stalls representing all of the island's culinary traditions and a public market on the Barachois.
Network note
Excellent 5G throughout Saint-Denis Le Barachois during the festival.
Roamix tip
Use Roamix data to check the Zembrocal program for the maloya and sega evening concerts, which are the festival's cultural highlights.
Piton de la Fournaise Eruption Season
wildlifePiton de la Fournaise · Year-round (most frequent April to August)
Piton de la Fournaise erupts on average three to four times per year, making any visit potentially coincide with an active lava flow. The OVPF observatory monitors seismic activity and announces eruptions in advance, with the Route du Volcan and summit access managed according to safety zones.
Network note
Check eruption status over Roamix data every morning during a south Reunion stay. The OVPF website and social media provide real-time status updates.
Roamix tip
An active eruption is a once-in-a-lifetime sight from the Pas de Bellecombe viewpoint. Check OVPF status over Roamix data in the morning; if an eruption is active and safety zone permits viewing, drive immediately as eruptions can end within days.
Semaine Bleue de la Plongee
sportsSaint-Gilles-les-Bains · October
The Blue Week of Diving, an annual diving festival in Saint-Gilles-les-Bains on the west coast, where dive clubs, underwater photographers and marine biologists come together for guided dives on the reef, competitions and a marine conservation showcase.
Network note
Strong 5G in Saint-Gilles. Check the OPR shark bulletin and reef dive schedules over Roamix data before any water activity.
Roamix tip
Book dive sessions with PADI-certified operators on the L'Hermitage reef in advance during the Blue Week. Use Roamix data to find dive club participants and confirm your slot.
Tour de La Reunion (Cycling)
sportsIsland-wide · July
The Tour Cycliste International de La Reunion, a UCI-rated professional cycling race circling the island across several stages including brutal mountain climbs to the Cirque de Salazie and the volcanic high plateau, drawing international teams to the Indian Ocean's most challenging road circuit.
Network note
Stage roads close to traffic during the race; 5G is strong in the main towns but expect delays from road closures on the mountain stages.
Roamix tip
Check the Tour de Reunion stage schedule over Roamix data and plan any driving around road closures on mountain stage days.
Semaine Creole
CulturalIsland-wide · October
Reunion's week-long celebration of Creole language and culture, with literary events, storytelling sessions in Creole, music performances and culinary demonstrations highlighting the island's unique multilingual identity across schools, libraries and public spaces.
Network note
Events island-wide; good 5G in main towns. Check the Semaine Creole program over Roamix data for public events near your location.
Roamix tip
Semaine Creole public events including free concerts and food markets are spread across the island. Use Roamix data to find nearby events and navigate to the evening maloya and sega performances.
Spring
September to November is the shoulder season with generally good weather, less crowded trails and the Grand Raid in October. Temperatures warm toward summer from November. Sea turtle season begins at Mafate adjacent beaches.
Summer
December to March is the austral summer and cyclone season. Hot and humid with temperatures around 28 to 34C on the coast. Cyclone risk is highest January to February. Some trails close and the Route du Volcan can be blocked. Not ideal for first-time visitors to the Cirques.
Fall
April and May mark the transition from wet to dry season. Weather stabilizes, tourist numbers drop and the Cirques become accessible as trails dry out. Good time for hiking with lower accommodation costs.
Winter
June to August is the dry austral winter and Reunion's peak tourist season. Piton des Neiges and the Cirque de Mafate are at their most accessible. Temperatures are cooler at altitude (minus 2 to 5C at the summit) and the coast stays warm at 22 to 26C. Grand Raid trail running event is in October.
Remote Work from Reunion
Reunion is a strong remote work option for French residents and those on longer European stays. The combination of strong coastal 5G, French regulatory environment, Indian Ocean scenery and direct flights from Paris makes it attractive for working travelers.
Orange Reunion 5G in Saint-Denis handles video calls and tethering reliably. A Roamix plan with 20 GB or more supports a full working week alongside hiking and beach activities. Coworking spaces are limited; most remote workers use hotel rooms or cafes in Saint-Denis and Saint-Pierre.
Reunion is at UTC+4, which means it is 3 to 4 hours ahead of France and 8 to 9 hours ahead of US East Coast. Morning hikes align well with an afternoon Paris working session. Use your Roamix eSIM as a secure hotspot for sensitive calls on public wifi.
Get connected the moment you land in Reunion.
Get your Reunion eSIMLocal Tips for Reunion
Language
French is the official language and used in all formal settings. Reunion Creole (Creole Reunionnais) is the widely spoken everyday language between locals and is not mutually intelligible with other French Creoles. English is limited outside international hotels. A French translation app downloaded offline is strongly recommended.
Tipping
Tipping is not obligatory but is appreciated. French norms apply; rounding up a restaurant bill or leaving EUR 1 to 2 is a common gesture. Mountain guides and refuge staff welcome a tip at the end of a multi-day hike.
Food & Dining
Reunionnais cuisine blends French, Indian, Chinese, Malagasy and African influences into a rich creole tradition. Try carry (Creole curry with rice and rougail tomato sauce), rougail saucisse (sausage stew), bouchons (steamed pork dumplings), and the achards pickled vegetables. The local rhum arrange (infused rum) is drunk as an aperitif.
Transport
A rental car is almost essential for visiting the Cirques, the volcano and the south coast. The Route du Volcan closes during eruptions; check eruption status over Roamix data before heading up. Download the offline route before any mountain drive as phone signal can be unreliable on the hairpin sections.
Emergency Numbers
general
112
police
17
ambulance
15
fire
18
Essential Apps
Rando Reunion
Official hiking app for Reunion's GRR trail network with offline trail maps, elevation profiles and mountain refuge contacts for the Cirques.
Observatoire Reunion (OVPF eruption alerts)
Live eruption status for Piton de la Fournaise from the official volcanic observatory; essential before driving the Route du Volcan.
OPR Shark Observatory
Official shark risk bulletin app for Reunion; swimming is only safe in the lagoon-protected west coast beaches when the shark alert is not active.
Safety & Health in Reunion
Reunion is generally safe for tourists. The main physical risks are the volcanic and mountain environment, not crime. Hiking in the Cirques and on the volcano carries real altitude and weather risks. The shark risk along the non-lagoon coast is serious and well-documented; multiple fatal attacks have occurred on the east and south coasts.
Keep your Roamix eSIM active along the coast for eruption alerts and shark risk bulletins. In the Cirques, inform your mountain refuge of your route plan before going off-grid in Mafate, and always carry the rescue service number (196) written offline.
Health Note
Healthcare in Reunion is French standard and excellent. The CHU Felix Guyon hospital in Saint-Denis and the CHU Sud hospital in Saint-Pierre handle serious emergencies. Travel health insurance is still recommended for remote hiking and water activities.
Water Safety
Tap water is safe to drink throughout Reunion. Mountain stream water should be filtered before drinking. Sea swimming is only safe in the lagoon zone on the west coast between Boucan Canot and Saint-Pierre; the east and south coasts have strong currents and shark risk.
Frequently Asked Questions
Reunion eSIM, connectivity, and travel
What is the best eSIM for Reunion?
Roamix is a strong choice for Reunion because it connects to Orange Reunion, which has the widest 5G coverage on the island. It is particularly useful for visitors on non-French plans, as most European and international carriers bill Reunion as 'rest of world' rather than EU.
Do I need a SIM card for Reunion?
You do not need a physical SIM. A Roamix Reunion eSIM gives you local 4G and 5G from the moment you land at Roland Garros, at a much lower cost than most international roaming plans.
Does EU Roam Like At Home apply in Reunion?
No. Reunion is a French overseas territory but is not part of the EU single market roaming zone. Most EU SIM cards are billed at 'rest of world' rates in Reunion. Verify with your specific carrier, but most visitors need a local or Roamix plan.
How do I set up an eSIM for Reunion?
Buy a Roamix Reunion plan, install the eSIM over wifi before departure, enable data roaming on the Roamix line, and it connects automatically to Orange Reunion or SFR when you land at RUN.
Will my eSIM work in the Cirque de Mafate?
No. The Cirque de Mafate has no mobile coverage of any kind. It is one of the only permanently inhabited car-free and signal-free areas in France. Download all trail maps, refuge contacts and emergency numbers over Roamix data before crossing the caldera rim.
Is it safe to swim at Reunion beaches?
Swimming is only safe in the lagoon-protected beaches on the west coast, between Boucan Canot and Saint-Pierre. The east and south coasts are unsafe for swimming due to shark risk and strong currents. Check the OPR shark bulletin over Roamix data before any west coast water activity.
How much data do I need for two weeks in Reunion?
A two-week trip covering the coast and Cirques typically uses 6 to 10 GB. Front-load large offline trail downloads in Saint-Denis for Mafate and Piton des Neiges, where signal disappears.
Do I need a visa for Reunion?
Entry rules follow French Schengen rules. EU citizens travel freely. US, UK, Canada and Australian citizens enter visa-free for up to 90 days. No separate Reunion visa exists; standard French entry requirements apply.
Is airport wifi enough at Roland Garros, or should I get a Reunion eSIM?
Roland Garros has free wifi in the terminal. A Roamix Reunion eSIM keeps you connected in the rental car, on the mountain roads and throughout the island without interruption.
When does Piton de la Fournaise erupt?
Piton de la Fournaise erupts on average 3 to 4 times per year, most frequently between April and August. Check the OVPF eruption bulletin over Roamix data each morning during your south Reunion stay. An active eruption visible from the Pas de Bellecombe viewpoint is a rare highlight.
What currency does Reunion use?
Reunion uses the euro. No currency exchange is needed for European visitors. Cards are widely accepted across the island, with cash needed mainly at mountain refuges in the Cirques.
What plug type does Reunion use?
Reunion uses Type E and F (French/European two-pin round) plugs at 230V, the same as mainland France and most of continental Europe.
What are the best apps to use in Reunion?
Rando Reunion for offline trail maps in the Cirques, the OVPF eruption status app before any volcano visit, and the OPR shark observatory app before any beach swimming. These three apps together cover the main safety and navigation needs on the island.
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Stay connected across Reunion with Roamix
Skip the airport SIM queue at Roland Garros. Install a Roamix Reunion eSIM before you fly and land with fast 4G and 5G ready for the coast, the Cirques and the volcano.
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