In April warmest sea in Slovenia is usually observed in the following locations: Dolenjske Toplice, Portoroz, Piran.
Table below shows the average sea water temperature for marine resorts of Slovenia in April for the last three years.
| Place name | April 2025 | April 2024 | April 2023 |
|---|---|---|---|
| Dolenjske Toplice | 56.6°F | 58.4°F | 54.5°F |
| Portoroz | 56.5°F | 58.7°F | 54.5°F |
| Piran | 56.5°F | 58.7°F | 54.5°F |
| Strunjan | 56.3°F | 58.4°F | 54.3°F |
| Bohinjsko Jezero | 56.2°F | 57.1°F | 54.3°F |
| Isola | 56.2°F | 58.2°F | 54.1°F |
| Koper | 56.1°F | 58.0°F | 54.0°F |
| Cerkno | 56.1°F | 57.1°F | 54.3°F |
Charts below show average sea water temperature for Slovenia resorts with the warmest sea in April.
You can also check other months of the year to see sea temperature of Slovenia resorts at that time.
Places in Slovenia:
Name
°F
