Sea temperature in Thessaloniki in January
The sea around Thessaloniki averages 15°C in January, usually between 13°C and 17°C. That is cold for most swimmers; a wetsuit helps.
Average15°CCold
Usual range13°C–17°C80% of readings
vs December−1.5°cooler
vs February−0.7°cooler next month
Through the year
Monthly averages 2023–2025. Water at 22°C or warmer: June–October.
January in recent years
| 2023 | 15°C |
|---|---|
| 2024 | 16°C |
| 2025 | 14°C |
Nearby in January
Beaches in Thessaloniki
10 of 10 beaches have an Excellent EU water-quality grade. See which ones are calm today.