Sea temperature in Skiathos in May
The sea around Skiathos averages 18°C in May, usually between 16°C and 20°C. That is cold for most swimmers; a wetsuit helps.
Average18°CCool
Usual range16°C–20°C80% of readings
vs April+2.0°warmer
vs June+5.4°warmer next month
Through the year
Monthly averages 2023–2025. Water at 22°C or warmer: June–October.
May in recent years
| 2023 | 17°C |
|---|---|
| 2024 | 19°C |
| 2025 | 18°C |
Nearby in May
Beaches in Skiathos
13 of 13 beaches have an Excellent EU water-quality grade. See which ones are calm today.