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Greece weather in October: temperatures, sea and rain
In October Athens averages 16–24°C, with about 5 rain days. The sea around Athens and the islands is around 21–23°C. Warmest place in the table: Rhodes (up to 25°C). Thessaloniki: 12–22°C.
Temperatures, sea and rain in October
| Place | Temp (min–max) | Sea | Rain days | Rain (mm) |
|---|---|---|---|---|
| Athens | 16–24° | 22° | 5 | 45 |
| Thessaloniki | 12–22° | — | 4 | 35 |
| Crete (Heraklion) | 18–24° | 23° | 4 | 45 |
| Rhodes | 19–25° | 23° | 3 | 45 |
| Mykonos (Cyclades) | 18–22° | 21° | 5 | 45 |
| Santorini (Cyclades) | 18–23° | 22° | 3 | 60 |
Long-term averages in Celsius, from Climates to Travel (Athens, Thessaloniki and Heraklion: 1991–2020). “Rain days”: days in the month with precipitation. The source gives no sea temperature for Thessaloniki. These are averages, not a forecast: any year can bring heatwaves, cold spells or storms.
The sea in October: can you swim?
Possible, if you don't mind cool water: 21–23°C on average. Warmest in Rhodes (23°C) and Crete (23°C).
What's open and on in October
- The Athens Epidaurus Festival runs from May to October. At the ancient theatre of Epidaurus, performances are on Fridays and Saturdays in July and August. (Wikipedia)
- By mid-October many Mykonos hotels and restaurants start to close, and by the end of the month it is very quiet. Direct Mykonos–Santorini ferries usually run until late October. (SantoriniDave)
- Autumn and winter are storm season: in late September and early October 2026 Crete was under a red warning, with floods and 112 alerts. Check the weather warnings before you travel. Read more · Weather warnings
Holidays and events
- 26 October 2026 · Agios Dimitrios – Thessaloniki city holiday Thessaloniki only: public services closed and some shops shut. A normal day in Athens.
- 28 October 2026 · Ohi Day – national holiday Most shops, banks and services closed. Parades in every city.
Greek holidays: full calendar
What to pack in October
- Summer clothes for the day and a light layer (sweatshirt or thin jacket) for evenings and boat trips.
- Sunscreen and comfortable walking shoes.
- Swimwear: the sea is around 22°C.
Plan your trip
Common questions
What is the weather like in Greece in October?
In October Athens averages 16–24°C, with about 5 rain days. The sea around Athens and the islands is around 21–23°C. Warmest place in the table: Rhodes (up to 25°C). Thessaloniki: 12–22°C.
Can you swim in the sea in Greece in October?
Possible, if you don't mind cool water: 21–23°C on average. Warmest in Rhodes (23°C) and Crete (23°C).
How many rain days are there in Greece in October?
Athens has about 5 rain days on average in October. Most rain days in the table: Athens (5). Autumn and winter can also bring storms, so check the weather warnings before you travel.
Where is warmest in Greece in October?
By the averages in the table, Rhodes: up to 25°C by day. Coldest is Thessaloniki and the north: 12–22°C.
What should I pack for Greece in October?
Summer clothes for the day and a light layer (sweatshirt or thin jacket) for evenings and boat trips. Sunscreen and comfortable walking shoes. Swimwear: the sea is around 22°C.
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Sources
Information checked on 4 October 2026. Dates and opening hours change, so check before you travel.
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