Sea temperature in Kefalonia in January
The sea around Kefalonia averages 17°C in January, usually between 17°C and 18°C. That is cold for most swimmers; a wetsuit helps.
Average17°CCold
Usual range17°C–18°C80% of readings
vs December−1.3°cooler
vs February−0.8°cooler next month
Through the year
Monthly averages 2023–2025. Water at 22°C or warmer: June–October.
January in recent years
| 2023 | 17°C |
|---|---|
| 2024 | 17°C |
| 2025 | 18°C |
Nearby in January
Beaches in Kefalonia
34 of 34 beaches have an Excellent EU water-quality grade. See which ones are calm today.