Sea temperature in Kos in October
The sea around Kos averages 24°C in October, usually between 22°C and 26°C. That is warm enough for most people to swim comfortably.
Average24°CWarm
Usual range22°C–26°C80% of readings
vs September−1.9°cooler
vs November−1.9°cooler next month
Through the year
Monthly averages 2023–2025. Water at 22°C or warmer: June–November.
October in recent years
| 2023 | 25°C |
|---|---|
| 2024 | 24°C |
| 2025 | 24°C |
Nearby in October
Beaches in Kos
8 of 16 beaches have an Excellent EU water-quality grade. See which ones are calm today.