In August warmest sea in Switzerland is usually observed in the following locations: Zurich, Winterthur, Montreux.
Table below shows the average sea water temperature for marine resorts of Switzerland in August for the last three years.
| Place name | August 2026 | August 2025 | August 2024 |
|---|---|---|---|
| Zurich | 76.5°F | 72.9°F | 75.1°F |
| Winterthur | 76.5°F | 72.9°F | 75.0°F |
| Montreux | 76.2°F | 73.4°F | 73.7°F |
| Gstaad | 76.2°F | 73.4°F | 73.7°F |
| Verbier | 76.2°F | 73.4°F | 73.7°F |
| Vevey | 76.1°F | 73.2°F | 73.6°F |
| Lake Geneva | 75.7°F | 72.5°F | 73.6°F |
| St Gallen | 75.5°F | 71.8°F | 74.2°F |
| Lausanne | 75.4°F | 72.6°F | 73.4°F |
| Geneva | 75.2°F | 71.9°F | 74.1°F |
Charts below show average sea water temperature for Switzerland resorts with the warmest sea in August.
You can also check other months of the year to see sea temperature of Switzerland resorts at that time.
Places in Switzerland:
Name
°F
