17.09
thu
thu
Day
57°F
S 6 mph
Precip.
2%
2%
Night
54°F
NW 3 mph
Precip.
17%
17%
18.09
fri
fri
Day
59°F
S 5 mph
Precip.
2%
2%
Night
54°F
W 4 mph
Precip.
13%
13%
19.09
sat
sat
Day
59°F
SE 5 mph
Precip.
11%
11%
Night
57°F
W 4 mph
Precip.
9%
9%
20.09
sun
sun
Day
64°F
SE 6 mph
Precip.
2%
2%
Night
61°F
W 5 mph
Precip.
10%
10%
21.09
mon
mon
Day
64°F
S 8 mph
Precip.
5%
5%
Night
59°F
SW 7 mph
Precip.
9%
9%
22.09
tue
tue
Day
61°F
NW 7 mph
Precip.
3%
3%
Night
57°F
W 2 mph
Precip.
13%
13%
23.09
wed
wed
Day
63°F
SE 4 mph
Precip.
4%
4%
Night
59°F
W 2 mph
Precip.
11%
11%
sea water
temperature
temperature
| Lake Geneva |
monthly
weather
weather
| Lake Geneva |
current
weather
weather
| Lake Geneva |
14 days
forecast
forecast
| Lake Geneva |
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 72.5°F. The highest and lowest sea temperatures during the month were 75.9°F and 69.6°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 60.4°F. The highest and lowest sea temperatures during the month were 64.9°F and 56.7°F.
Air temperature in Lake Geneva, °F
Precipitation total in Lake Geneva, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Lake Geneva
Lake Geneva on a weather map
Places in Switzerland:
Name
°F
24 Hours Forecast
Lake Geneva
Local time: 15:59
September 17, thursday
1800
59°F
S
4 mph
4 mph
2100
57°F
NW
3 mph
3 mph
September 18, friday
0000
54°F
NW
3 mph
3 mph
0300
54°F
NW
3 mph
3 mph
0600
52°F
NW
3 mph
3 mph
0900
50°F
SW
2 mph
2 mph
1200
59°F
S
5 mph
5 mph
1500
63°F
S
5 mph
5 mph
