Sea temperature in Athens in May
The sea around Athens averages 18°C in May, usually between 17°C and 20°C. That is cold for most swimmers; a wetsuit helps.
Average18°CCool
Usual range17°C–20°C80% of readings
vs April+1.7°warmer
vs June+4.1°warmer next month
Through the year
Monthly averages 2023–2025. Water at 22°C or warmer: June–October.
May in recent years
| 2023 | 18°C |
|---|---|
| 2024 | 19°C |
| 2025 | 18°C |
Nearby in May
Beaches in Athens
33 of 33 beaches have an Excellent EU water-quality grade. See which ones are calm today.