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Greece Sea Temperature by Month: When Can You Swim?
Typical Greek sea temperatures month by month and the best months for swimming.
By the iLoveGreece editorial team · Last reviewed 2026-10
Quick answer
The sea is warm enough for most people from June to October. It's about 19–20°C in May, 24–26°C in August and still around 22–23°C in October. April and November are only for the brave, around 17–19°C. The south (Crete, Rhodes) stays warmer for longer.
Typical temperatures
| Month | Sea °C | Swimming |
|---|---|---|
| April | 16–17 | Cold |
| May | 18–20 | Fresh |
| June | 21–23 | Good |
| July | 23–25 | Great |
| August | 24–26 | Warmest |
| September | 23–25 | Great |
| October | 21–23 | Good |
| November | 18–20 | Fresh |
Good to know
- Strong summer wind can make the water feel colder on the windy side.
- Check live sea temperature before you go.
FAQ
Can you swim in Greece in October?
Yes — the sea is usually around 22°C, warmer in Crete and Rhodes.
Can you swim in May?
Yes, if you don't mind fresh water around 19°C.
Related guides
- Greece in October: Weather, Swimming and What Closes
- Santorini in October: Weather, Sea Temperature and Is It Worth It?
- Greece in January: Weather, Skiing, Free Museums and Is It Worth It?
- Crete in October and November: Weather, Sea Temperature and What's Open
- What Greeks Eat for Breakfast
- What Time Do Greeks Eat Dinner?
Updated 2026-10. General planning guidance. Check with operators and local authorities.