Average sea water temperature in September:
+64.4°F
| Minimum sea water temperature in September: | 74.1°F |
| Maximum sea water temperature in September: | 32.0°F |
Daily sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 66.9°F. The highest and lowest sea temperatures during the month were 69.4°F and 64.0°F.
Monthly sea water temperature in Geneva, °F
Which Switzerland resorts have warmest sea in September?
| Place name | September 2025 | September 2024 |
|---|---|---|
| Montreux | 68.5°F | 68.9°F |
| Gstaad | 68.5°F | 68.9°F |
| Verbier | 68.5°F | 68.9°F |
| Vevey | 68.4°F | 68.9°F |
| Lausanne | 68.1°F | 68.7°F |
| Lake Geneva | 68.0°F | 68.4°F |
| Zurich | 67.6°F | 68.7°F |
| Winterthur | 67.6°F | 68.7°F |
| Geneva | 66.9°F | 67.2°F |
| St Gallen | 66.8°F | 67.8°F |
Best time for vacation in Geneva
Geneva on a weather map
Places in Switzerland:
Name
°F
24 Hours Forecast
Geneva
Local time: 15:42
January 14, wednesday
1800
36°F
NW
1 mph
1 mph
2100
36°F
N
3 mph
3 mph
January 15, thursday
0000
36°F
N
3 mph
3 mph
0300
34°F
NE
3 mph
3 mph
0600
36°F
NE
4 mph
4 mph
0900
37°F
N
1 mph
1 mph
1200
46°F
S
1 mph
1 mph
1500
48°F
E
1 mph
1 mph
