Greece eSIM: Athens, the islands and the ferries
5 min read · Updated July 6, 2026
A Greek trip is really two trips — the mainland and the islands, stitched together by ferries. A Greece eSIM keeps Ferryhopper, maps and booking apps working from Athens airport to a Santorini caldera, all on one profile.
Which networks you get
A Greece travel eSIM roams on Vodafone and WIND (Nova) Greece, picking the strongest signal. Coverage is 5G/LTE in Athens, Thessaloniki and the big island towns, with solid LTE across most of the popular islands and the ferry routes near the coast.
How much data for Greece
Maps, ferry apps, restaurant lookups and messaging run 300–500 MB a day; add beach-day photo backups and reels and you’re near 1 GB. A 5 GB plan suits a week of Athens plus an island; two weeks of island-hopping, or sharing, wants 10 GB+.
On the ferries
You’ll have signal leaving and approaching each port, but expect it to drop mid-crossing on the longer open-water routes — download your tickets and next-stop map before you sail.
Questions
Does it work on all the islands?
Will I have data on the ferry?
Do I need a Greek number?
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