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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
VoutoumiIonian Islands20.7°C
Kastani BeachSkopelos20.7°C
Anthony Quinn BayDodecanese20.6°C
Mylos BeachIonian Islands20.6°C
Glyfada CorfuIonian Islands20.6°C
Simos BeachPeloponnese20.6°C
Monolithos BeachCyclades20.6°C
Possidi BeachHalkidiki20.6°C
Sarakiniko BeachMilos20.6°C
Chrysi IslandCrete20.6°C
Bali BeachCrete20.6°C
Tigaki BeachKos20.6°C
Kyra Panagia BeachKarpathos20.6°C
Halikounas BeachCorfu20.6°C
Kalami BeachCorfu20.6°C
Alykes BeachZakynthos20.6°C
Karathona BeachPeloponnese20.6°C
PreveliCrete20.5°C
Lindos BayDodecanese20.5°C
LalariaSporades20.5°C
Pounda BeachCyclades20.5°C
Frangokastello BeachCrete20.5°C
Canal dAmourCorfu20.5°C
Kavouri BeachAthens Riviera20.5°C
Lemonakia BeachSamos20.5°C
Karfas BeachChios20.5°C
TsigradoCyclades20.4°C
PrasonisiDodecanese20.4°C
KavourotrypesHalkidiki20.4°C
KarydiHalkidiki20.4°C
Egremni BeachIonian Islands20.4°C
PaliochoriCyclades20.4°C
Platis GialosCyclades20.4°C
Kefalos BeachKos20.4°C
Glyfada Beach CorfuCorfu20.4°C
Myrtos BeachKefalonia20.4°C
Achata BeachKarpathos20.4°C
Banana BeachZakynthos20.4°C
Kalamaki BeachZakynthos20.4°C
Hanioti BeachHalkidiki20.4°C
Vouliagmeni BeachAthens Riviera20.4°C
Petra BeachLesvos20.4°C
MiliaSporades20.3°C
Kalo LivadiCyclades20.3°C
Kedrodasos BeachCrete20.3°C
Ammoudi Beach PlakiasCrete20.3°C
Agios Nikolaos BeachCrete20.3°C
Xerokambos BeachCrete20.3°C
Ixia BeachRhodes20.3°C
Glyfada Beach CorfuCorfu20.3°C
Tsilivi BeachZakynthos20.3°C
Santa Maria ParosParos20.3°C
Kalithea Beach HalkidikiHalkidiki20.3°C
Sarti BeachHalkidiki20.3°C
Alyki Beach ThassosThassos20.3°C
Paradise Beach ThassosThassos20.3°C
Super ParadiseCyclades20.2°C
PelekasIonian Islands20.2°C
Issos BeachIonian Islands20.2°C
Xerokampos BeachCrete20.2°C
Plimmiri BeachRhodes20.2°C
Amoudara BeachCrete20.2°C
Malia BeachCrete20.2°C
Stalis BeachCrete20.2°C
Kokkini Hani BeachCrete20.2°C
Elounda BeachCrete20.2°C
Marmari BeachKos20.2°C
Camel BeachKos20.2°C
Mastichari BeachKos20.2°C
Apella BeachKarpathos20.2°C
Elafonisos Simos BeachPeloponnese20.2°C
PlakaCyclades20.1°C
ParagaCyclades20.1°C
KolymbithresCyclades20.1°C
Porto KatsikiIonian Islands20.1°C
VoutoumiIonian Islands20.1°C
Romanos BeachPeloponnese20.1°C
Marathi BeachCrete20.1°C
Loutraki CreteCrete20.1°C
Seitan LimaniaCrete20.1°C
Voulisma BeachCrete20.1°C
Karydi BeachHalkidiki20.1°C
Paradise Beach KosKos20.1°C
Agia Marina BeachCrete20.1°C
Platanias BeachCrete20.1°C
Almyrida BeachCrete20.1°C
Agios Gordios BeachCorfu20.1°C
Barbati BeachCorfu20.1°C
Makris GialosKefalonia20.1°C
Ornos BeachMykonos20.1°C
Ftelia BeachMykonos20.1°C
Astir BeachAthens Riviera20.1°C
Voidokilia BeachPeloponnese20.1°C
Banana Beach SkiathosSkiathos20.1°C
MatalaCrete20.0°C
BalosCrete20.0°C
Porto TimoniIonian Islands20.0°C
Alyko BeachCyclades20.0°C
Kalafatis BeachCyclades20.0°C
Elafonissi BeachCrete20.0°C
Anthony Quinn BayRhodes20.0°C
Issos BeachCorfu20.0°C
Kalives BeachCrete20.0°C
Elli BeachRhodes20.0°C
Kalithea BeachRhodes20.0°C
Myrtiotissa BeachCorfu20.0°C
Nissaki BeachCorfu20.0°C
Petani BeachKefalonia20.0°C
Kolitsani BeachIos20.0°C
Nea Fokea BeachHalkidiki20.0°C
Ammouliani BeachHalkidiki20.0°C
Ritsa BeachPeloponnese20.0°C
MylopotasCyclades19.9°C
PerissaCyclades19.9°C
FiriplakaCyclades19.9°C
St Paul's BayDodecanese19.9°C
Marcello BeachCyclades19.9°C
Stavros BeachCrete19.9°C
Chrissi Island BeachCrete19.9°C
Pyrgaki BeachCyclades19.9°C
TsoukaliaSporades19.9°C
Tigania BeachHalkidiki19.9°C
Kommos BeachCrete19.9°C
Georgioupoli BeachCrete19.9°C
Hersonissos BeachCrete19.9°C
Kremasti BeachRhodes19.9°C
Fourni BeachRhodes19.9°C
Arillas BeachCorfu19.9°C
Agios NikitasLefkada19.9°C
Kalafatis BeachMykonos19.9°C
Punda BeachParos19.9°C
Foneas BeachPeloponnese19.9°C
Vatera BeachLesvos19.9°C
Elia BeachCyclades19.8°C
EgremniIonian Islands19.8°C
TsambikaDodecanese19.8°C
Sani BeachHalkidiki19.8°C
Triopetra BeachCrete19.8°C
Komos BeachCrete19.8°C
KavourotrypesHalkidiki19.8°C
Pefkochori BeachHalkidiki19.8°C
Marmari BeachKos19.8°C
Souda BeachCrete19.8°C
Marathi BeachCrete19.8°C
Porto ZoroZakynthos19.8°C
Psarou BeachMykonos19.8°C
Agios SostisMykonos19.8°C
Paleochori BeachMilos19.8°C
Kleftiko BeachMilos19.8°C
Kryopigi BeachHalkidiki19.8°C
Polychrono BeachHalkidiki19.8°C
Kalamitsi BeachHalkidiki19.8°C
Golden Beach ThassosThassos19.8°C
Skala EresouLesvos19.8°C
StavrosCrete19.7°C
GlyfadaIonian Islands19.7°C
Mikri ViglaDodecanese19.7°C
Gerakas BeachIonian Islands19.7°C
Banana BeachIonian Islands19.7°C
Navagio BeachZakynthos19.7°C
Analipsi BeachCrete19.7°C
Sarakiniko Beach CreteCrete19.7°C
Faliraki BeachRhodes19.7°C
Ladiko BeachRhodes19.7°C
Paradise Beach KosKos19.7°C
Xigia BeachZakynthos19.7°C
Laganas BeachZakynthos19.7°C
Xi BeachKefalonia19.7°C
Perivolos BeachSantorini19.7°C
Koukounaries BeachSkiathos19.7°C
Milia Beach SkopelosSkopelos19.7°C
VaiCrete19.6°C
ManganariCyclades19.6°C
Agios ProkopiosCyclades19.6°C
Agia AnnaCyclades19.6°C
Golden BeachCyclades19.6°C
AntisamosIonian Islands19.6°C
Antisamos BeachIonian Islands19.6°C
Agrari BeachCyclades19.6°C
Kallithea BeachHalkidiki19.6°C
Kalathas BeachCrete19.6°C
Rethymno BeachCrete19.6°C
Voulismeni BeachCrete19.6°C
Lentas BeachCrete19.6°C
Agios Stefanos KosKos19.6°C
Lambi BeachKos19.6°C
Kavos BeachCorfu19.6°C
Agios Stefanos CorfuCorfu19.6°C
Vlychada BeachSantorini19.6°C
White BeachSantorini19.6°C
Chrissi AktiParos19.6°C
Manganari BeachIos19.6°C
Pefkohori BeachHalkidiki19.6°C
Vourvourou BeachHalkidiki19.6°C
Voula BeachAthens Riviera19.6°C
Schinias BeachAthens Riviera19.6°C
Kalogria BeachPeloponnese19.6°C
Marathopoli BeachPeloponnese19.6°C
Panormos Beach SkopelosSkopelos19.6°C
Psili Ammos SamosSamos19.6°C
ElafonisiCrete19.5°C
Red BeachCyclades19.5°C
Vrika BeachIonian Islands19.5°C
Panormos BeachCrete19.5°C
Lalaria BeachSporades19.5°C
Lagomandra BeachHalkidiki19.5°C
Sidari BeachCorfu19.5°C
Egremni BeachLefkada19.5°C
Damnoni BeachCrete19.5°C
Sitia BeachCrete19.5°C
Traganou BeachRhodes19.5°C
Kontogialos BeachCorfu19.5°C
Skala BeachKefalonia19.5°C
Sarakiniko BeachMilos19.5°C
Sani BeachHalkidiki19.5°C
Legrena BeachAthens Riviera19.5°C
FalassarnaCrete19.4°C
Seitan LimaniaCrete19.4°C
KamariCyclades19.4°C
SarakinikoCyclades19.4°C
PaleokastritsaIonian Islands19.4°C
KathismaIonian Islands19.4°C
KoukounariesSporades19.4°C
Skala BeachIonian Islands19.4°C
Tsilivi BeachIonian Islands19.4°C
Almyros BeachCrete19.4°C
Hovolo BeachSporades19.4°C
Glystra BeachRhodes19.4°C
Agios Stefanos KosKos19.4°C
Spinalonga BeachCrete19.4°C
Gerakas BeachZakynthos19.4°C
Plakias BeachCrete19.4°C
Porto TimoniCorfu19.4°C
Porto LimnionasZakynthos19.4°C
Milos Beach LefkadaLefkada19.4°C
Panormos Beach MykonosMykonos19.4°C
Marble BeachThassos19.4°C
Xi BeachIonian Islands19.3°C
Manganari BeachCyclades19.3°C
Porto KatsikiLefkada19.3°C
Panormo BeachCrete19.3°C
Voulisma BeachCrete19.3°C
Tsamadou BeachSamos19.3°C

Sea temperature in Greece — FAQ

How warm is the sea in Greece in November?

The sea off Greece averages about 20.0°C in November, 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.