Measurements:
°C
°F
World Resorts Slovenia

Slovenia Sea Water Temperature in September

The Slovenia resorts with the warmest sea water temperature in September are Koper, Portoroz and Piran.

Below you can see a list of all popular Slovenia resorts and information about sea water temperature in September for the last two years.

Resort Name September 2023 September 2022 September 2021
Koper 78.3°F 76.1°F 75.1°F
Portoroz 78.3°F 77.1°F 75.8°F
Piran 78.3°F 77.1°F 75.8°F
Strunjan 78.2°F 76.7°F 75.5°F
Isola 78.1°F 76.4°F 75.3°F
Cerkno 77.0°F 75.3°F 74.4°F
Bohinjsko Jezero 76.8°F 75.3°F 74.3°F
Dolenjske Toplice 76.4°F 73.0°F 72.0°F

Please see following sea water temperature averages charts for the warmest Slovenia resorts in September.

You can also get the same information for the every other month of the year when the average sea water temperature is greater then 70°F.