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Sea temperature in Greece

Live water temperatures and swimming conditions across 243 beaches on the Greece coast.

Best time to swim in Greece

The sea in Greece peaks in August, when the water averages around 26°C.

The main swimming season runs from May – November, when surface temperatures stay comfortable for extended sessions.

On average, 7 months a year sit above 20°C — the threshold most swimmers describe as pleasant without a wetsuit.

Shoulder months like April and December are noticeably cooler but often quieter, with fewer crowds and steadier weather.

Outside peak season the water drops toward 17°C, so a 3/2mm shorty or full wetsuit makes long swims much more comfortable.

The coldest month is typically February at around 15°C, when cold-water swimmers dominate the coast.

Greece sea temperature history

Long-term climatology for Greece shows an annual mean sea temperature of 20°C, ranging from 15°C in winter to 26°C at the summer peak.

The seasonal swing is roughly 11°C between the coldest and warmest month — a useful yardstick when comparing years or checking whether the current sea is running above or below average.

Recent decades have trended slightly warmer at Greece, in line with regional sea-surface temperature records for the wider basin.

Monthly averages below are drawn from multi-decadal climatology and are updated as new observations arrive.

Jan
16°C
Feb
15°C
Mar
15°C
Apr
17°C
May
20°C
Jun
23°C
Jul
25°C
Aug
26°C
Sep
25°C
Oct
22°C
Nov
20°C
Dec
17°C

Values are area averages; individual beaches vary by exposure and depth.

Greece sea temperature: frequently asked questions

What is the warmest month to swim in Greece?

August is the warmest month in Greece, when the sea averages about 26°C. Late-season warmth often persists a few weeks after peak.

When is the sea coldest in Greece?

The coldest month in Greece is typically February, when the water averages around 15°C. Cold-water swimmers and surfers dominate this period.

When can you swim in Greece without a wetsuit?

The main swimming season in Greece runs from May – November — about 7 months a year when the sea sits above 20°C, the level most swimmers describe as pleasant without a wetsuit.

Do I need a wetsuit in Greece?

Outside peak summer the water in Greece drops toward 17°C, so a 3/2mm shorty or full wetsuit makes long swims much more comfortable. In peak months most swimmers go without.

What is the average sea temperature in Greece?

The long-term annual mean sea temperature in Greece is about 20°C, based on multi-decadal climatology of the surrounding waters.

How do I check the current sea temperature in Greece?

The live reading at the top of this page shows the current sea temperature in Greece, updated hourly from marine buoy and satellite data. The 7-day forecast covers water, air, waves, wind and UV for the week ahead.

Greece sea temperature by month

Average sea temperatures around Greece for every month of the year, based on long-term Open-Meteo marine climatology.

Monthly average sea temperature in Greece
MonthAverage sea
January16.0°C
February15.0°C
March15.0°C
April17.0°C
May20.0°C
June23.0°C
July25.0°C
August ⭐26.0°C
September25.0°C
October22.0°C
November20.0°C
December17.0°C

Monthly figures are modelled climatology averages, not live readings. How accurate is our data?

Coastal regions of Greece

Region hubs with live sea temperatures, swim conditions and a beach directory.

Greek Islands
107 beaches
Cyclades, Dodecanese and Ionian beaches with 26°C summer water.
Halkidiki
21 beaches
21 tracked beaches in Halkidiki, Greece, with live Aegean Sea temperatures.

Warmest beaches in Greece right now

BeachRegionSea
ManganariCyclades25.7°C
KathismaIonian Islands25.7°C
PelekasIonian Islands25.7°C
Karydi BeachHalkidiki25.7°C
Porto LimnionasZakynthos25.7°C
Xigia BeachZakynthos25.7°C
Makris GialosKefalonia25.7°C
Ftelia BeachMykonos25.7°C
Porto TimoniIonian Islands25.6°C
LalariaSporades25.6°C
KavourotrypesHalkidiki25.6°C
Kalafatis BeachCyclades25.6°C
Pyrgaki BeachCyclades25.6°C
TsoukaliaSporades25.6°C
Possidi BeachHalkidiki25.6°C
Agios Stefanos KosKos25.6°C
Myrtos BeachKefalonia25.6°C
Lentas BeachCrete25.6°C
Tigaki BeachKos25.6°C
Lambi BeachKos25.6°C
Porto TimoniCorfu25.6°C
Skala EresouLesvos25.6°C
KolymbithresCyclades25.5°C
Mylos BeachIonian Islands25.5°C
Pounda BeachCyclades25.5°C
Lalaria BeachSporades25.5°C
Paradise Beach KosKos25.5°C
Egremni BeachLefkada25.5°C
Kedrodasos BeachCrete25.5°C
Kommos BeachCrete25.5°C
Elounda BeachCrete25.5°C
Ixia BeachRhodes25.5°C
Fourni BeachRhodes25.5°C
Alykes BeachZakynthos25.5°C
Manganari BeachIos25.5°C
Kryopigi BeachHalkidiki25.5°C
Agia AnnaCyclades25.4°C
KamariCyclades25.4°C
Vrika BeachIonian Islands25.4°C
Skala BeachIonian Islands25.4°C
Stavros BeachCrete25.4°C
Voulisma BeachCrete25.4°C
Hovolo BeachSporades25.4°C
Glystra BeachRhodes25.4°C
Marathi BeachCrete25.4°C
Georgioupoli BeachCrete25.4°C
Ladiko BeachRhodes25.4°C
Kyra Panagia BeachKarpathos25.4°C
Arillas BeachCorfu25.4°C
Banana BeachZakynthos25.4°C
Kalamaki BeachZakynthos25.4°C
Agios SostisMykonos25.4°C
Panormos Beach MykonosMykonos25.4°C
Perivolos BeachSantorini25.4°C
Vourvourou BeachHalkidiki25.4°C
Ammouliani BeachHalkidiki25.4°C
Karathona BeachPeloponnese25.4°C
Kastani BeachSkopelos25.4°C
Golden Beach ThassosThassos25.4°C
Psili Ammos SamosSamos25.4°C
VoutoumiIonian Islands25.3°C
Antisamos BeachIonian Islands25.3°C
Platis GialosCyclades25.3°C
Chrissi Island BeachCrete25.3°C
Manganari BeachCyclades25.3°C
Analipsi BeachCrete25.3°C
Xerokambos BeachCrete25.3°C
Kremasti BeachRhodes25.3°C
Marmari BeachKos25.3°C
Agios Stefanos KosKos25.3°C
Kavos BeachCorfu25.3°C
Nissaki BeachCorfu25.3°C
Tsilivi BeachZakynthos25.3°C
Skala BeachKefalonia25.3°C
Sarakiniko BeachMilos25.3°C
Vouliagmeni BeachAthens Riviera25.3°C
PaleokastritsaIonian Islands25.2°C
KarydiHalkidiki25.2°C
PaliochoriCyclades25.2°C
Tigania BeachHalkidiki25.2°C
Plimmiri BeachRhodes25.2°C
Elafonissi BeachCrete25.2°C
Plakias BeachCrete25.2°C
Kalithea BeachRhodes25.2°C
Kontogialos BeachCorfu25.2°C
Kalami BeachCorfu25.2°C
Hanioti BeachHalkidiki25.2°C
Voidokilia BeachPeloponnese25.2°C
Banana Beach SkiathosSkiathos25.2°C
EgremniIonian Islands25.1°C
Tsilivi BeachIonian Islands25.1°C
Romanos BeachPeloponnese25.1°C
Agrari BeachCyclades25.1°C
Loutraki CreteCrete25.1°C
Lagomandra BeachHalkidiki25.1°C
Souda BeachCrete25.1°C
Traganou BeachRhodes25.1°C
Achata BeachKarpathos25.1°C
Laganas BeachZakynthos25.1°C
Kalithea Beach HalkidikiHalkidiki25.1°C
Astir BeachAthens Riviera25.1°C
Kalogria BeachPeloponnese25.1°C
Ritsa BeachPeloponnese25.1°C
PlakaCyclades25.0°C
Red BeachCyclades25.0°C
AntisamosIonian Islands25.0°C
Glyfada CorfuIonian Islands25.0°C
Marcello BeachCyclades25.0°C
Triopetra BeachCrete25.0°C
Chrysi IslandCrete25.0°C
Kalives BeachCrete25.0°C
Sarakiniko Beach CreteCrete25.0°C
Paradise Beach KosKos25.0°C
Porto ZoroZakynthos25.0°C
Santa Maria ParosParos25.0°C
Chrissi AktiParos25.0°C
Sani BeachHalkidiki25.0°C
Sarti BeachHalkidiki25.0°C
Elafonisos Simos BeachPeloponnese25.0°C
Marathopoli BeachPeloponnese25.0°C
Koukounaries BeachSkiathos25.0°C
ParagaCyclades24.9°C
SarakinikoCyclades24.9°C
GlyfadaIonian Islands24.9°C
Porto KatsikiIonian Islands24.9°C
VoutoumiIonian Islands24.9°C
Sani BeachHalkidiki24.9°C
Frangokastello BeachCrete24.9°C
Ammoudi Beach PlakiasCrete24.9°C
Kalathas BeachCrete24.9°C
Rethymno BeachCrete24.9°C
Voulismeni BeachCrete24.9°C
Camel BeachKos24.9°C
Xi BeachKefalonia24.9°C
Milos Beach LefkadaLefkada24.9°C
Psarou BeachMykonos24.9°C
Kalafatis BeachMykonos24.9°C
White BeachSantorini24.9°C
Paleochori BeachMilos24.9°C
Voula BeachAthens Riviera24.9°C
Tsamadou BeachSamos24.9°C
FalassarnaCrete24.8°C
MatalaCrete24.8°C
Anthony Quinn BayDodecanese24.8°C
KoukounariesSporades24.8°C
Simos BeachPeloponnese24.8°C
Panormos BeachCrete24.8°C
Xerokampos BeachCrete24.8°C
Elli BeachRhodes24.8°C
Apella BeachKarpathos24.8°C
Kolitsani BeachIos24.8°C
Pefkohori BeachHalkidiki24.8°C
Panormos Beach SkopelosSkopelos24.8°C
Alyki Beach ThassosThassos24.8°C
Marble BeachThassos24.8°C
Karfas BeachChios24.8°C
MylopotasCyclades24.7°C
Super ParadiseCyclades24.7°C
Elia BeachCyclades24.7°C
St Paul's BayDodecanese24.7°C
Xi BeachIonian Islands24.7°C
Seitan LimaniaCrete24.7°C
Almyros BeachCrete24.7°C
Pefkochori BeachHalkidiki24.7°C
Anthony Quinn BayRhodes24.7°C
Gerakas BeachZakynthos24.7°C
Damnoni BeachCrete24.7°C
Agia Marina BeachCrete24.7°C
Platanias BeachCrete24.7°C
Almyrida BeachCrete24.7°C
Amoudara BeachCrete24.7°C
Malia BeachCrete24.7°C
Glyfada Beach CorfuCorfu24.7°C
Petani BeachKefalonia24.7°C
Punda BeachParos24.7°C
Kleftiko BeachMilos24.7°C
Milia Beach SkopelosSkopelos24.7°C
Vatera BeachLesvos24.7°C
ElafonisiCrete24.6°C
BalosCrete24.6°C
PerissaCyclades24.6°C
FiriplakaCyclades24.6°C
TsigradoCyclades24.6°C
TsambikaDodecanese24.6°C
Egremni BeachIonian Islands24.6°C
Banana BeachIonian Islands24.6°C
Issos BeachIonian Islands24.6°C
Marathi BeachCrete24.6°C
Kallithea BeachHalkidiki24.6°C
Marmari BeachKos24.6°C
Issos BeachCorfu24.6°C
Panormo BeachCrete24.6°C
Stalis BeachCrete24.6°C
Hersonissos BeachCrete24.6°C
Myrtiotissa BeachCorfu24.6°C
Barbati BeachCorfu24.6°C
Kalamitsi BeachHalkidiki24.6°C
Legrena BeachAthens Riviera24.6°C
Seitan LimaniaCrete24.5°C
PreveliCrete24.5°C
PrasonisiDodecanese24.5°C
Mikri ViglaDodecanese24.5°C
MiliaSporades24.5°C
Gerakas BeachIonian Islands24.5°C
Kalo LivadiCyclades24.5°C
Spinalonga BeachCrete24.5°C
Sidari BeachCorfu24.5°C
Voulisma BeachCrete24.5°C
Faliraki BeachRhodes24.5°C
Vlychada BeachSantorini24.5°C
Nea Fokea BeachHalkidiki24.5°C
StavrosCrete24.4°C
Golden BeachCyclades24.4°C
Lindos BayDodecanese24.4°C
Alyko BeachCyclades24.4°C
Monolithos BeachCyclades24.4°C
Komos BeachCrete24.4°C
KavourotrypesHalkidiki24.4°C
Porto KatsikiLefkada24.4°C
Navagio BeachZakynthos24.4°C
Sarakiniko BeachMilos24.4°C
Agios Nikolaos BeachCrete24.4°C
Sitia BeachCrete24.4°C
Mastichari BeachKos24.4°C
Agios Gordios BeachCorfu24.4°C
Halikounas BeachCorfu24.4°C
Agios Stefanos CorfuCorfu24.4°C
Agios NikitasLefkada24.4°C
Kavouri BeachAthens Riviera24.4°C
Foneas BeachPeloponnese24.4°C
Lemonakia BeachSamos24.4°C
Petra BeachLesvos24.4°C
VaiCrete24.3°C
Agios ProkopiosCyclades24.3°C
Kefalos BeachKos24.3°C
Glyfada Beach CorfuCorfu24.3°C
Bali BeachCrete24.3°C
Kokkini Hani BeachCrete24.3°C
Canal dAmourCorfu24.3°C
Ornos BeachMykonos24.3°C
Polychrono BeachHalkidiki24.3°C
Schinias BeachAthens Riviera24.3°C
Paradise Beach ThassosThassos24.3°C

Sea temperature in Greece — FAQ

How warm is the sea in Greece in September?

The sea off Greece averages about 25.0°C in September, based on long-term monthly averages for this coast.

When is the best time to swim in Greece?

Greece is warmest in August (around 26.0°C) and coldest in February (around 15.0°C). There are typically 5 months a year when the water sits above 22°C.

What is the average yearly sea temperature in Greece?

Across all twelve months, the sea in Greece averages about 20.1°C.

Do you need a wetsuit to swim in Greece?

In peak season (around August, ~26.0°C) most swimmers are comfortable without a wetsuit. Outside summer, when the water drops toward 15.0°C, a 3/2mm to 5/4mm wetsuit is recommended.