19.09
sat
sat
Day
59°F
NW 11 mph
Precip.
49%
49%
Night
63°F
W 5 mph
Precip.
54%
54%
20.09
sun
sun
Day
59°F
SW 15 mph
Precip.
89%
89%
Night
59°F
W 17 mph
Precip.
26%
26%
21.09
mon
mon
Day
52°F
W 17 mph
Precip.
89%
89%
Night
55°F
W 15 mph
Precip.
22%
22%
22.09
tue
tue
Day
55°F
SW 14 mph
Precip.
13%
13%
Night
54°F
SW 8 mph
Precip.
8%
8%
23.09
wed
wed
Day
63°F
SW 13 mph
Precip.
5%
5%
Night
52°F
S 7 mph
Precip.
24%
24%
24.09
thu
thu
Day
57°F
SW 10 mph
Precip.
15%
15%
Night
50°F
S 7 mph
Precip.
11%
11%
25.09
fri
fri
Day
63°F
SW 8 mph
Precip.
4%
4%
Night
52°F
W 4 mph
Precip.
9%
9%
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 32.0°F. The highest and lowest sea temperatures during the month were 32.0°F and 32.0°F.
Sea water temperature in October, °F
Show year:
2025
2024
2022
The average sea water temperature in October of 2025 was 32.0°F. The highest and lowest sea temperatures during the month were 32.0°F and 32.0°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 USA:
Name
°F
24 Hours Forecast
Lake Geneva
Local time: 04:24
September 19, saturday
0600
57°F
NW
12 mph
12 mph
0900
57°F
NW
11 mph
11 mph
1200
59°F
NW
11 mph
11 mph
1500
63°F
NW
8 mph
8 mph
1800
63°F
NW
7 mph
7 mph
2100
64°F
W
4 mph
4 mph
September 20, sunday
0000
63°F
W
5 mph
5 mph
0300
63°F
W
8 mph
8 mph
