Sea temperature: where is the water warmest?
Average sea temperatures for 211 coastal destinations. In October, the warmest sea is at Abu Dhabi with 31 °C, and 170 destinations have water of 20 °C or more.
Sea temperature month by month
The warmest sea worldwide and in Europe, and how many destinations reach 20 °C.
From about 20 °C, the sea is comfortable for swimming.
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0)