EuropeAthensGreece eSIM and Travel Guide: Stay Connected in Athens and the Islands
Greece has good 4G coverage in Athens and on the main islands, but signal drops quickly on smaller islands, in rural areas and on long ferry crossings. The easiest way to stay connected is a Roamix Greece eSIM, which activates on arrival and keeps Google Maps, ferry bookings and Beat taxi hailing working from the moment you land at Athens airport. Budget 5 to 8 GB for a two week island hopping trip.
Key Takeaways
- Cosmote has the widest coverage across mainland Greece, the main islands and even smaller island settlements.
- A Roamix eSIM activates on arrival so you skip SIM counters and carrier roaming charges.
- Cash is still widely used in Greece, especially on smaller islands and at local tavernas.
- Greece is in the Schengen Area, so most Western passport holders enter visa free for up to 90 days.
- Budget 5 to 8 GB for two weeks, but cache offline maps before island hopping as ferry crossings can be entirely without signal.
Quick Facts
Greece Connectivity
Get a Roamix Greece eSIM and land in Athens already connected.
How to Stay Connected in Greece
Free wifi is common in Athens cafes and hotels, and reasonably available in island resort areas, but speeds vary and rural and ferry wifi is unreliable. Mobile data is far more consistent for navigation and bookings.
Option
Best For
Notes
RecommendedRoamix eSIM
Most travellers
Instant activation, local Cosmote network reach, no roaming bill and nothing physical to collect.
Local physical SIM
Long stays needing a local number
Available at Cosmote stores in Athens with ID registration, requires swapping your home SIM.
Pocket wifi
Groups sharing one connection
Another device to charge and manage, less useful when the group splits across different islands.
Carrier roaming
Very short trips with no setup time
The most expensive option and unreliable for island hopping where coverage varies.
For nearly everyone visiting Greece, a Roamix eSIM on the Cosmote network is the simplest and most reliable way to stay online, from Athens to the smallest Aegean island with mobile coverage.
Get connected the moment you land in Greece.
Get your Greece eSIMMobile Networks in Greece
Greece has reliable 4G coverage in Athens, Thessaloniki and on the major tourist islands, with 5G beginning to roll out in the two main cities. A Roamix Greece eSIM connects to the strongest local network on arrival, giving you reliable data in Athens and across the popular Aegean and Ionian islands without SIM counter queues or carrier roaming fees.
The widest national reach, covering mainland Greece, all main islands and many smaller settlements that other operators do not serve.
Strong coverage in Athens, Thessaloniki and on the most popular Aegean islands including Mykonos, Santorini and Crete.
Good urban coverage in Athens and competitive on the popular Ionian and Aegean islands.
Typical Speeds
Expect 30 to 150 Mbps on 4G and 5G in Athens, with 15 to 50 Mbps on major island networks.
5G Status
5G is live in Athens and Thessaloniki. Most islands operate on 4G.
For island hopping beyond the main Cyclades, choose a Roamix plan on the Cosmote footprint, as it reaches the widest range of smaller and less touristed islands.
Signal drops significantly on remote island interiors, long ferry crossings between islands and in rural mountain areas of the Peloponnese and northern Greece. Download offline maps before island hopping.
Greek networks use standard EU LTE bands compatible with most modern unlocked phones, so a Roamix eSIM works on virtually any recent device.
Data Usage Guide
Greece trips lean on Google Maps for navigating Athens and island roads, Ferryhopper for booking and checking ferry times, and Beat for taxis. Cache everything offline before a ferry crossing, as you will have no data on the water.
Download offline maps of every island you plan to visit before leaving Athens or the mainland. Ferry crossings can take several hours with zero signal, and island roads are difficult to navigate without an offline map.
Data by Activity
Light Use
4 to 6 GB
One week in Athens and one island
City navigation, ferry app use, social sharing and messaging with hosts.
Standard
6 to 10 GB
Two week island hopping trip
Ferry bookings, navigation on multiple islands, regular photo and social sharing.
Heavy Use
20 GB or more
Remote work base in Athens
Video calls, laptop tethering and cloud uploads alongside exploring the city.
Apps & Internet Freedom
Greece has an open internet, so all common apps work normally on a Roamix eSIM.
There is no general censorship of social media, messaging or search in Greece. No VPN is required for any mainstream service.
Widely used in Greece for messaging and coordination.
FaceTime
Works normally over data and wifi.
Google Maps and Search
No restrictions, essential for island navigation.
Social media
Instagram, Facebook, TikTok and X all work.
How to Set Up a Greece eSIM
A Roamix Greece eSIM is best installed over wifi before departure. It activates automatically when you connect to a Greek network on arrival, so you are online before you reach the Metro Line 3 platform at the airport.
Works on eSIM capable phones including iPhone XS and newer, Google Pixel 3 and newer, and recent Samsung Galaxy S models. The phone must be carrier unlocked.
- 1
Buy your plan on the Roamix Greece eSIM page before you travel.
- 2
Install the eSIM over wifi by scanning the QR code.
- 3
Keep your home SIM for calls and set Roamix as your data line.
- 4
Enable data roaming for the Roamix line only.
- 5
Land in Greece and the eSIM connects automatically to a local network.
APN Note
The correct APN is configured automatically on most devices. If data does not start, apply the APN from your activation email and toggle airplane mode.
Troubleshooting
No data on arrival usually means data roaming is off for the Roamix line or the network needs manual selection. Restart the phone after checking both.
Get connected the moment you land in Greece.
Get your Greece eSIMArrival Checklist
Confirm your Roamix eSIM has connected to a local network before leaving the arrivals hall at ATH.
Take the Metro Line 3 from Athens Airport directly to the city centre, or hail a Beat or Bolt taxi from the app.
Withdraw euros at an airport ATM since smaller islands and local tavernas often prefer cash.
Download offline maps of all islands you plan to visit before leaving Athens, as ferry crossings have no data connection.
Save ferry timetables and booking confirmations offline before boarding any island ferry.
How locals communicate
WhatsApp and Viber are both widely used in Greece for messaging and calls. Viber has historically had a strong user base among Greeks, alongside WhatsApp.
Install both WhatsApp and Viber before arriving if you plan to stay in contact with local accommodation hosts and guides.
Airports in Greece
Athens International Airport Eleftherios Venizelos
Athens
Free unlimited wifi throughout the terminal, including in the arrivals hall and commercial areas.
ATH is 35 km from central Athens. Metro Line 3 (blue line) runs to Syntagma Square in 40 minutes for EUR 10.50. Activate your Roamix eSIM before landing so you can hail a Beat or Bolt taxi and book your first Acropolis timed-entry ticket at etickets.tap.gr the moment you exit customs.
Thessaloniki Macedonia Airport
Thessaloniki
Free wifi available throughout the terminal building. Coverage is reliable.
SKG is 15 km from central Thessaloniki. Bus line 78 connects to the city centre in 45 minutes. An active eSIM lets you download Thessaloniki city maps for the Aristotelous Square area and the Byzantine churches circuit without relying on slow airport wifi.
Heraklion Nikos Kazantzakis Airport
Heraklion, Crete
Free wifi in the terminal. Note that the new Kastelli Airport is under construction to replace HER, with opening planned for 2027.
HER is 4 km from Heraklion city centre. Bus line 1 runs every 15 minutes. Book Knossos Palace timed-entry tickets at odysseus.culture.gr on Roamix data before leaving the terminal; July and August walk-in queues can exceed two hours.
Rhodes Diagoras Airport
Rhodes
Free wifi in the terminal with good coverage in the arrivals area.
RHO is 14 km from Rhodes Town. Bus service to the Old Town takes 25 minutes. Download offline maps for the Rhodes Town medieval street grid in the taxi; the walled city is disorienting to navigate without a pre-loaded map.
Visa & Entry for Greece
Greece is a Schengen Area member. Most Western passport holders enter visa free for up to 90 days in any 180 day period. The EU Entry/Exit System (EES) biometric registration launched in October 2025 and now applies at Greek international borders.
eVisa / ETA
ETIAS pre-travel authorisation for visa exempt visitors is expected to launch in late 2026. Until then, eligible visitors enter with only the EES biometric check.
Passport validity
Your passport must be valid for at least 3 months beyond your planned departure from the Schengen Area and issued within the last 10 years.
Onward ticket
Proof of onward or return travel and sufficient funds may be requested at immigration.
Keep digital copies of your passport and booking confirmations accessible offline, and use your Roamix eSIM to present documents at the border.
Entry rules change. Always confirm current requirements with the Greek consulate or official Schengen sources before travel.
Get connected the moment you land in Greece.
Get your Greece eSIMMoney & Payments in Greece
Greece uses the euro. Cash is still widely preferred on smaller islands, at local tavernas and in village shops. Carry enough euros to cover several days on a remote island without ATM access.
Cash vs Card
Cards are accepted in most Athens restaurants and shops, and in larger island resort hotels. Smaller tavernas, beaches and island ferry kiosks often prefer cash.
ATMs
ATMs are available in major towns but absent on smaller islands. Withdraw enough cash on the mainland or a large island before heading to remote destinations.
Payment Apps
Apple Pay and Google Pay are increasingly accepted in Athens and on the main islands. A connected Roamix eSIM keeps your banking apps working when you need to find an ATM or check your balance.
Daily Budget
Budget travellers spend around 50 to 80 EUR a day, mid range 100 to 200 EUR, with Mykonos and Santorini at the higher end.
Data cost: Carrier roaming charges for Greece can be significant, while a Roamix data plan covers the same trip for a fraction of the cost.
Getting Around Greece
Greece combines a good Athens metro with an extensive ferry network connecting the mainland to hundreds of islands, plus bus and car options for the mainland. A connected phone is essential for ferry bookings, taxi apps and navigating Greek island roads.
Athens Metro and tram
Athens has a three line metro covering most major attractions, from the airport to the port of Piraeus. Use the OASA Telematics app or Google Maps for live routing.
Island ferries
The backbone of Greek island travel, operated by multiple companies from Piraeus, Rafina and Lavrio. Book on Ferryhopper or DirectFerries and keep your eSIM active at ports for boarding updates.
Beat and Bolt taxis
Beat (formerly Taxibeat) and Bolt are the go to ride hailing apps in Athens, replacing the need to negotiate with street taxis. Both need an active data connection.
Car rental
Essential for exploring Crete, the Peloponnese and northern Greece. Download offline maps of islands before picking up your rental car, as signal is unreliable away from main roads.
Regions & Travel
Greece is one of the world's great travel destinations, combining 5,000 years of history in Athens with the turquoise waters, whitewashed villages and sunsets of the Aegean islands. A connected phone is essential for navigating the ferry network, booking island accommodation and finding your way around Athens.
Best time to visit: May to June and September to October offer ideal weather with fewer crowds and lower prices than high summer. July and August are hot and extremely busy on the popular Cyclades islands.
Attica and Athens
The Greek capital, home to the Acropolis, the Acropolis Museum, the National Archaeological Museum, the Monastiraki Flea Market, vibrant street food in Psirri and Monastiraki, and a world class nightlife scene. Cape Sounion and its Temple of Poseidon are within an hour's drive.
Signal: Excellent Cosmote 5G throughout Athens city centre including Plaka, Monastiraki, Syntagma and Kolonaki. Metro Line 3 maintains 4G in underground stations. Piraeus and Lavrio ports are well covered.
Thessaloniki and Northern Greece
Greece's second city is a vibrant university town with Byzantine churches, the Modiano and Kapani food markets, the White Tower on the Nea Paralia waterfront, and the Aristotelous Square. Northern Greece extends to the monasteries of Meteora, the royal tombs of Vergina, and the forests and stone villages of Zagori in Epirus.
Signal: Excellent Cosmote 5G in Thessaloniki city centre and along the waterfront. Strong 4G to 5G at the Meteora monastery viewpoints above Kalambaka. Zagori's Vikos Gorge trailheads have 4G; deep gorge sections lose signal.
Crete
Greece's largest island rewards a week-long stay: the Minoan palace of Knossos, the Samaria Gorge (the longest gorge in Europe), the walled Venetian city of Chania, the pink sand beach at Elafonisi, and the Spinalonga Venetian Fortress. Heraklion, Chania and Rethymno each have their own distinct character.
Signal: Excellent Cosmote 4G to 5G in Heraklion, Chania and Rethymno. Strong coverage along the E75 north coast road. The Samaria Gorge (16 km from Omalos to Agia Roumeli) has zero coverage throughout; download offline maps before the descent.
Cyclades (Santorini, Mykonos, Paros, Naxos)
The Cyclades are Greece's most iconic archipelago: Santorini's caldera and blue-domed churches in Oia, the windmills and beach clubs of Mykonos, the marble villages of Naxos, and the quieter charm of Paros. The ferry network connecting them runs on Seajets and Blue Star Ferries from Piraeus. Milos, with its Sarakiniko lunar beach and Kleftiko sea caves, is the standout off-circuit island.
Signal: Strong Cosmote 4G to 5G in Fira and Oia (Santorini), Mykonos Town, Parikia (Paros), and Naxos Town. Mid-Aegean ferry crossings lose signal 15 to 20 km from shore. Manually set Cosmote GR on devices that wander onto weaker signals.
Dodecanese (Rhodes, Kos, Patmos)
The Dodecanese are Greece's southeasternmost islands, closer to Turkey than to Athens. Rhodes Old Town is the best-preserved medieval walled city in the Mediterranean. Kos has the ancient Asclepeion ruins alongside beach resort infrastructure. Patmos, where the Book of Revelation was written, is one of Greece's most serene islands. On Kos and Patmos, manually select Cosmote GR to avoid latching onto nearby Turkish networks.
Signal: Strong Cosmote 4G to 5G in Rhodes Town and at Rhodes airport. Good coverage in Kos Town and Kardamena. On Kos and Patmos, manually select Cosmote GR in network settings to avoid accidental non-EU Turkish network connections.
Hidden Gems
Samaria Gorge
National ParkCrete
One of Europe's longest gorges and a legendary hike through wild Cretan mountain scenery, ending at a remote seaside village accessible only by ferry.
Signal: No signal inside the gorge, which runs 16 km through a national park in the White Mountains. Signal exists at the start in Omalos and at the end in Agia Roumeli.
Download offline maps of the gorge route and ferry schedule from Agia Roumeli before starting the hike, as there is no signal for the entire six to eight hour walk.
Meteora
religious siteThessaly
Sixth-century Byzantine monasteries perched on top of 400-metre sandstone rock pillars above the Thessalian plain. Megalo Meteoron, Varlaam and Agia Triada are the most striking. No place in Greece looks like Meteora.
Signal: Good 4G coverage in Kalambaka town at the base, with reasonable signal at the main monastery viewpoints. Trail paths between rock formations can be weaker.
Use your Roamix eSIM in Kalambaka to check opening times at meteora.gr and book a guided tour before climbing, as hours vary by day and season.
Nafplio
archaeological sitePeloponnese
Greece's first capital after independence, with Venetian architecture, the Palamidi hilltop fortress reached by 999 steps, the tiny Bourtzi island castle and the best seafood restaurants in the Peloponnese along the harbour promenade.
Signal: Cosmote 4G to 5G throughout Nafplio old town, Syntagma Square and the approach road to the Palamidi fortress. The Bourtzi island fortress in the harbour is reachable by boat and has coverage.
Nafplio is the base for day trips to Mycenae (45 km), Epidaurus (30 km) and Tiryns (4 km). Book Athens Epidaurus Festival performance tickets at greekfestival.gr on Roamix data months in advance.
Monemvasia
city districtPeloponnese
A complete Byzantine and Venetian walled city on a single Gibraltar-like rock connected to the mainland by a single causeway. No cars enter the rock town. The upper castle has an unobstructed view of the Laconian Gulf.
Signal: Cosmote 4G in Gefyra, the mainland causeway town. The walled medieval town on the rock has intermittent coverage; some streets within the walls are dead zones depending on orientation.
Accommodation inside Monemvasia's walled town books out months in advance. Book converted Byzantine houses at Kellia or Byzantino on Booking.com via Roamix data early. No ATM is inside the walls; withdraw cash in Gefyra before crossing.
Zagori and Vikos Gorge
National ParkEpirus
The Vikos Gorge is among the deepest gorges in the world relative to its width, 900 metres deep and as narrow as 1,100 metres across. The 46 Zagori stone villages connected by arched Ottoman bridges are among the most beautiful traditional settlements in the Balkans.
Signal: Cosmote 4G in Ioannina city and the Zagori stone villages including Papigo, Monodendri and Kipi. The Vikos Gorge trail from Monodendri to Mikro Papigo (15 km) loses signal in the gorge itself.
Download the Komoot trail for Vikos on Roamix data in Ioannina before heading into the mountain roads. The Papigo rock pools (Rogovo) require a 30-minute hike and are the best swimming hole in mainland Greece.
Milos Island
IslandCyclades
The island where the Venus de Milo was found in 1820, with the Sarakiniko beach of white pumice formations and Kleftiko turquoise water sea caves accessible only by boat, while nearby Santorini sees far heavier crowds.
Signal: Cosmote 4G in Adamas port and Plaka village. Sarakiniko beach and Kleftiko sea caves (accessible by boat) have variable coverage. Inland mining district roads are intermittent.
Book your Kleftiko boat trip through local operators such as Milos Yachting on Roamix data from Adamas. Trips operate only in calm sea conditions, so check meteo.gr before booking.
Hydra Island
IslandSaronic Gulf
The only island in Greece that has banned all motor vehicles since 1984, with transport by donkey, water taxi or on foot. The 18th-century sea captain mansion architecture is the most beautiful in the Saronic Gulf.
Signal: Cosmote 4G throughout Hydra Town and the harbour area. Hiking trails into the island interior toward the monastery of Profitis Ilias have intermittent coverage.
Hydra is 90 minutes from Piraeus by Hellenic Seaways hydrofoil. Book the Mandraki private beach through Mandraki Beach Club on Roamix data from Piraeus pier before boarding; reservation is required.
Chios Island
IslandNorth Aegean
Chios produces 80 percent of the world's mastic resin, and its mastichochoria mastic villages (Pyrgi with geometric sgraffito facades, Mesta with its enclosed defensive street plan) are unlike any villages in Europe.
Signal: Cosmote 4G in Chios Town and the main mastic villages including Pyrgi, Mesta and Olympi. The medieval village of Mesta has Cosmote signal at the main square. West coast beaches have variable coverage.
Book a mastic farm visit in Pyrgi through the Mastic Growers Association on Roamix data. The Chios mastic shop in Chios Town stocks every product made from the resin, and the island pairs well with a day trip to tiny Inousses island.
Delphi Archaeological Site
archaeological siteCentral Greece
The ancient Greeks considered Delphi the omphalos (navel) of the world. The site overlooks the Gulf of Corinth from a mountain ledge of extraordinary beauty, and the Charioteer of Delphi in the museum is one of the finest bronzes in antiquity.
Signal: Cosmote 4G throughout the Delphi site including the Temple of Apollo, the Delphi Theatre, the Tholos of Athena Pronaia and the Delphi Archaeological Museum. The drive on the E962 through the Arachova mountain pass is covered.
Book tickets at odysseus.culture.gr on Roamix data before arriving; July and August walk-in queues at 11am can be two hours. The site opens at 8am and is spectacular before tour buses arrive.
Pelion Peninsula
mountain regionThessaly
The mythological home of the Centaurs and the launching point of the Argonauts, with dense chestnut forests, Byzantine and Ottoman stone villages perched on the mountain, and hidden coves including Damouchari (used in filming Mamma Mia). The narrow-gauge Pelion Railway (Moutzouris) is one of Europe's most scenic mountain trains.
Signal: Cosmote 4G in Volos city and the Pelion peninsula villages including Portaria, Makrinitsa, Milies and Mouresi. The road descending to Damouchari beach has intermittent signal on sharp bends. Download offline maps in Volos before driving the mountain roads.
Check the Pelion Railway (Milies to Ano Lehonia) schedule at trainose.gr on Roamix data. Pelion is best in autumn (September to November) when the forests turn and crowds are gone. Volos has excellent traditional ouzo tavernas on the waterfront.
Events & Best Seasons
Athens Epidaurus Festival
CulturalOdeon of Herodes Atticus (Athens) and Ancient Theatre of Epidaurus · June 27 to August 23
The most important cultural event in Greece: ancient drama, modern dance and world-class music performances in two of the world's most atmospheric venues. The Ancient Theatre of Epidaurus (4th century BC, capacity 14,000) has acoustics so extraordinary that a coin dropped on the stage is audible in the back row.
Network note
Good 4G coverage at the Odeon of Herodes Atticus in central Athens. The Epidaurus theatre is in a rural area with more limited signal; download tickets and directions before leaving Nafplio.
Roamix tip
Book at greekfestival.gr on Roamix data as soon as the programme drops in March; Epidaurus performances sell out 4 to 8 weeks in advance. The drive from Athens to Epidaurus takes two hours; many visitors combine it with a night in Nafplio.
Orthodox Easter (Pascha)
religiousNationwide, best experienced in Corfu, Olympos (Karpathos) or Monastiraki Square, Athens · April or May
The most important event in the Greek Orthodox calendar. The Anastasi midnight service on Easter Saturday sees entire villages emerge with candles, church bells ringing simultaneously across the country and the greeting Christos Anesti. Easter Sunday lamb roasting fills every courtyard and garden.
Network note
Networks can be congested in small island port towns during midnight Easter services and fireworks, particularly on Hydra, Patmos and Corfu.
Roamix tip
Corfu celebrates Easter with its unique Epitafios procession on Good Friday and Botides pottery throwing from balconies on Holy Saturday. Book accommodation in Corfu and all Cyclades islands for Easter weekend months in advance and secure ferry reservations early.
Patras Carnival
FestivalPatras, Peloponnese · Late January to February
The largest carnival in Europe by participant numbers, with over 1 million spectators at the peak Sunday parade events. The Patras Carnival runs for five weeks, culminating in the King Carnival float parade on the Sunday before Clean Monday. Patras is 2.5 hours from Athens by intercity bus.
Network note
Patras city centre has strong Cosmote 4G to 5G coverage throughout the carnival parade route and main squares.
Roamix tip
The main parade Sunday is one of the most spectacular street events in Europe. Book accommodation in Patras or Corinth (1 hour east) months in advance and secure bus tickets from Athens Kifissos station via ktelbus.com on Roamix data.
Clean Monday (Kathara Deftera)
national holidayNationwide, best in Athens (Filopappou Hill) and Meteora · February or March
The first day of Greek Orthodox Lent, celebrated with enormous family kite-flying on hilltops and coastlines across Greece. Traditional Clean Monday foods (lagana flatbread, taramosalata, olives and seafood) appear on every table. Athens' Filopappou Hill fills with kite flyers with views across to the Acropolis.
Network note
Cosmote 4G covers Filopappou Hill and the Acropolis area throughout the public holiday; expect higher than usual network traffic in central Athens.
Roamix tip
Clean Monday is a national public holiday. On this day, entry is free at all state archaeological sites. Check site hours at odysseus.culture.gr on Roamix data as schedules vary.
Thessaloniki International Film Festival
artsThessaloniki, Northern Greece · November
The leading film festival in southeastern Europe and the Balkans, focused on independent, arthouse and Balkan cinema. The festival screens over 200 films across Thessaloniki's historic cinemas including the Olympion on Aristotelous Square.
Network note
Excellent Cosmote 5G throughout Thessaloniki city centre and the Aristotelous Square cinema area. Network traffic is manageable even during peak festival evenings.
Roamix tip
Public screening tickets are available at filmfestival.gr on Roamix data. Pair the festival circuit with breakfast bougatsa, lunch at the Modiano market and dinner in the Ladadika district.
Rockwave Festival
musicTerra Vibe Park, Athens · July
Greece's largest outdoor rock and alternative music festival, held at Terra Vibe Park north of Athens. International headliners have included major rock and electronic acts. The festival draws 30,000 to 50,000 attendees.
Network note
Terra Vibe Park is 30 km north of central Athens; Cosmote 4G covers the venue but signal can be congested during headliner sets with large crowds.
Roamix tip
Festival shuttle buses run from Syntagma Metro station. Book tickets at rockwavefestival.gr on Roamix data when the programme is announced in spring; headliner days sell out within days.
Rethymno Carnival
FestivalRethymno, Crete · Late January to February
Rethymno's Venetian-era town centre provides the most atmospheric setting of any Greek carnival. The main parade floats through the Renaissance Loggia and along the Venetian harbour. Smaller and more intimate than Patras, Rethymno Carnival is considered the most authentically Greek of the major carnival celebrations.
Network note
Cosmote 4G covers the Rethymno Venetian old town and harbour parade route throughout the carnival period.
Roamix tip
Rethymno accommodation books out for the carnival finale weekend. Boutique hotels inside the Venetian walls are the most desirable; book at least 4 months ahead via Booking.com on Roamix data. The Venetian lighthouse and harbour provide a spectacular backdrop for the final parade.
Epidauros Asklepieia
CulturalAncient Theatre of Epidaurus, Peloponnese · July to August
Ancient Greek drama performed in the 4th-century BC theatre of Epidaurus, the best-preserved ancient theatre in the world. The National Theatre of Greece performs Sophocles, Euripides and Aeschylus in the original language with surtitles. No venue for classical drama on Earth compares to this setting.
Network note
The Epidaurus theatre site is in a rural area of the Peloponnese with limited mobile signal; save your tickets and directions offline before leaving the main road.
Roamix tip
Book at greekfestival.gr on Roamix data the moment tickets go on sale in March. Combine with a sunset dinner in Nafplio (30 km) before the 9pm performance starts.
Cretan Music and Dance Festival
CulturalRethymno, Heraklion and Chania, Crete · July and August
The summer months bring lyra music and traditional Cretan dance to every village square and festival stage on the island. The Rethymno Renaissance Festival in July focuses on theatrical and musical performances in Venetian-era venues. The Cretan lyra instrument is the musical identity of the island.
Network note
Cosmote 4G to 5G covers Rethymno, Heraklion and Chania festival venues well; village square performances in the interior can have lighter signal.
Roamix tip
Check the Rethymno Renaissance Festival programme at rethymno.gr on Roamix data for performance dates and venues. Genuine Cretan wedding celebrations encountered in village squares are the most authentic version of this music tradition.
Anastenaria Fire Walking Ceremony
CulturalLagkadas (near Thessaloniki) and Agia Eleni, Serres · May 21
One of the rarest traditional rituals in Europe: the Anastenaria fire walkers walk barefoot over burning coals while holding icons of Saints Constantine and Helen, in a ceremony believed to have pre-Christian origins. The ritual takes place in Lagkadas (20 km from Thessaloniki) and the village of Agia Eleni.
Network note
Cosmote 4G covers Lagkadas throughout the ceremony; the village is close enough to Thessaloniki that signal is reliable at the fire walking site.
Roamix tip
The fire walking ceremony is free to watch and takes place in the evening of May 21. Arrive in Lagkadas by 7pm for the procession to the fire. Book accommodation in Thessaloniki for May 21 well in advance as this date draws visitors from across Greece and the Balkans.
Spring
April to May offers wildflowers, Greek Easter celebrations and mild weather before the summer heat arrives.
Summer
June to August is hot and peak busy, with the Cyclades islands at their most crowded and expensive. Temperatures regularly exceed 35 degrees Celsius on the mainland.
Fall
September to October brings warm sea temperatures, fewer crowds and lower prices, making it arguably the best time to visit the islands.
Winter
November to March is the quiet off season when many island businesses close. Athens stays open and is worth visiting for its museums and food scene.
Remote Work from Greece
Athens is an increasingly popular remote work base with a growing coworking scene, fast urban internet and a high quality of life at lower cost than Western European capitals. Island working is possible but dependent on local network quality.
Athens 4G and 5G easily handles video calls and tethering. A Roamix plan of 20 GB or more suits a working week. On the islands, speeds and reliability vary, so rely on accommodation wifi for heavy tasks.
Athens coworking spaces are concentrated in Kolonaki and the centre. On the islands, use your eSIM for light connectivity and ask at your hotel or villa about the strength of their wifi for video calls.
Get connected the moment you land in Greece.
Get your Greece eSIMLocal Tips for Greece
Language
Greek is the official language. English is widely spoken in Athens and on the major tourist islands, but less common in rural mainland areas and on smaller islands. Learning a few Greek words earns warm appreciation from locals.
Tipping
Tipping is appreciated but not obligatory in Greece. Rounding up the bill or leaving 5 to 10 percent at a taverna is customary for good service.
Food & Dining
Greek cuisine is intensely regional and seasonal. Look for fresh grilled fish on the islands, slow roasted lamb in the mountains and mezze spreads in Athens. Many excellent local tavernas do not take reservations.
Transport
Use the OASA Telematics app or Google Maps for Athens transit planning. Book all island ferries in advance on Ferryhopper during July and August, as popular routes sell out.
Emergency Numbers
general
112
police
100
ambulance
166
fire
199
Essential Apps
Ferryhopper
Book and manage Greek island ferry tickets across all operators from one platform, with live departure updates.
Beat
The leading ride hailing app in Athens for booking licensed taxis and avoiding street negotiation.
OASA Telematics
Real time bus and tram arrival information for Athens, helping you navigate the city transit network.
Safety & Health in Greece
Greece is generally safe for travellers. The main concerns are petty theft in central Athens and at tourist sites, and the practical risks of summer heat, sun exposure and swimming in rough sea conditions around the islands.
Keep your Roamix eSIM active to receive ferry delay notifications, check sea conditions before swimming in remote coves, and reach emergency services on any island.
Health Note
Healthcare quality varies between Athens and smaller islands. EU residents use their European Health Insurance Card. Non EU visitors should carry comprehensive travel insurance. The summer sun in Greece is intense, so stay hydrated and use high SPF sunscreen.
Water Safety
Tap water is safe in Athens and most major towns, but not always reliable on smaller islands where bottled water is recommended.
Frequently Asked Questions
Greece eSIM, connectivity, and travel
What is the best eSIM for Greece?
Roamix is a strong choice for Greece because it connects to local networks including Cosmote, which has the widest reach across mainland Greece and the most islands, including smaller settlements. You install it before departure and land already connected.
Do I need a SIM card for Greece?
You do not need a physical SIM. A Roamix Greece eSIM gives you local data without swapping cards, activates automatically on arrival and avoids both airport SIM counter queues and expensive carrier roaming.
What is the most affordable eSIM for Greece?
Roamix offers competitive Greece data plans that undercut carrier roaming, with tiers sized for a short Athens break through to a month of island hopping. You pay only for the data you need.
What is the best way to stay connected while island hopping in Greece?
The most reliable option for island hopping is a travel eSIM like Roamix on the Cosmote network, paired with offline maps cached before each ferry crossing. A Roamix eSIM activates instantly, covers the main islands and avoids the roaming fees you would pay with a home carrier.
How do I set up a Greece eSIM?
Buy a Roamix Greece plan, install the eSIM over wifi before you fly, then enable data roaming on the Roamix line. It connects automatically to a local Greek network on arrival, with no store visit needed.
Does an eSIM work on the Greek islands?
Yes, on the main islands including Santorini, Mykonos, Crete, Corfu and Rhodes. Signal can be weaker or absent on remote island interiors, very small islands and during ferry crossings. Cache offline maps before you sail.
Can I use WhatsApp and Google in Greece?
Yes. Greece has an open internet, so WhatsApp, Viber, FaceTime, Google and social media all work normally on a Roamix eSIM without a VPN.
How much data do I need for two weeks island hopping in Greece?
Most island hoppers use 6 to 10 GB over two weeks, covering ferry bookings, navigation on multiple islands and regular social sharing. Cache offline maps for each island to minimise data use when out of coverage.
Do I need a visa to visit Greece?
Greece is in the Schengen Area. Most Western passport holders enter visa free for up to 90 days in any 180 day period. The EU Entry/Exit System biometric check now applies at Greek borders. ETIAS is expected from late 2026.
Do I need cash in Greece?
Yes. Cash is still widely used in Greece, particularly on smaller islands, at local tavernas and in village shops. Carry at least 50 to 100 euros and withdraw enough before leaving for a remote island, where ATMs may not exist.
How do I get around Athens as a tourist?
Athens has a three line metro, tram and bus network. Use the OASA Telematics app for real time arrivals, or Google Maps for route planning. For taxis, use the Beat or Bolt apps to avoid street fare negotiation, and keep your Roamix eSIM active throughout.
Is airport wifi at Athens enough or should I get an eSIM?
Airport wifi at Athens International is free but stops the moment you leave the terminal. A Roamix eSIM keeps you connected from the gate to the Metro Line 3 platform and throughout the 40 minute ride into the city.
Will my Roamix eSIM work on Kos or Rhodes near the Turkish border?
Yes, but you need to manually select Cosmote GR in your phone network settings on arrival at Kos, Lesvos, Samos and Chios. These islands are within a few kilometres of Turkey and phones on automatic network selection can latch onto Turkish carriers such as Turkcell, which are not covered by EU roaming rules and would generate unexpected charges. Your Roamix eSIM covers Cosmote GR only.
Does my eSIM work at Delphi and other mainland archaeological sites?
Yes. Cosmote 4G covers the Delphi site, including the Temple of Apollo, the Delphi Theatre and the Delphi Archaeological Museum. You can book tickets at odysseus.culture.gr on Roamix data on arrival. Coverage is similarly good at Nafplio, Epidaurus and Mycenae, making it easy to manage bookings and navigation across the Peloponnese and central Greece.
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Stay connected across Greece with Roamix
From Athens to Santorini and beyond, a Roamix Greece eSIM keeps you online everywhere. Install before you fly and skip the SIM counter at Athens airport.