Sea temperature in Kos in January
The sea around Kos averages 19°C in January, usually between 18°C and 21°C. That is cool: fine for a quick swim, many people find it chilly.
Average19°CCool
Usual range18°C–21°C80% of readings
vs December−1.3°cooler
vs February−1.3°cooler next month
Through the year
Monthly averages 2023–2025. Water at 22°C or warmer: June–November.
January in recent years
| 2023 | 19°C |
|---|---|
| 2024 | 20°C |
| 2025 | 19°C |
Nearby in January
Beaches in Kos
8 of 16 beaches have an Excellent EU water-quality grade. See which ones are calm today.