Sea temperature in Piraeus in January
The sea around Piraeus averages 16°C in January, usually between 15°C and 17°C. That is cold for most swimmers; a wetsuit helps.
Average16°CCold
Usual range15°C–17°C80% of readings
vs December−2.0°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 | 16°C |
|---|---|
| 2024 | 17°C |
| 2025 | 16°C |
Nearby in January
Beaches in Piraeus
104 of 104 beaches have an Excellent EU water-quality grade. See which ones are calm today.