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Greece in August: Crowds, 15 August Holiday and Heat
Greece in August: about 33°C, sea around 25°C, the 15 August holiday, packed ferries and highest prices.
By the iLoveGreece editorial team · Last reviewed 2026-11
Quick answer
August is the hottest and busiest month. Expect about 32–34°C, the warmest sea (about 25°C), strong Aegean winds on many days and full ferries, especially around 15 August, a major national holiday when many Greeks travel. Athens is quieter because locals head to the islands and villages.
At a glance
| Athens | Crete | Cyclades | |
|---|---|---|---|
| Daytime high | ≈33°C | ≈29°C | ≈27°C |
| Sea | — | ≈25°C | ≈24°C |
| Rainy days | ≈0 | ≈0 | ≈0 |
What to know
- 15 August (Dormition of the Virgin Mary): festivals on islands such as Tinos and Paros; ferries sell out.
- Some Athens shops and restaurants close for summer holidays.
- Wildfire risk is high: follow 112 alerts and avoid forests on high-risk days.
- Book everything early or consider late September instead.
FAQ
Is August the worst time to visit Greece?
It's the most crowded and expensive, but the warmest sea; it depends on what you want.
Do ferries sell out in August?
Popular routes and dates around 15 August often do. Book ahead.
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- Greece in September: Warm Sea, Fewer Crowds, Best Month?
- Greece in November: Weather, Sea, What's Open and Is It Worth It?
- Greece in June: Weather, Sea and How Busy It Gets
Updated 2026-11. General planning guidance. Check with operators and local authorities.