Measurements:
°C
°F
CURRENT WEATHER
22:23
Lake Geneva
66°F
NW 8 mph
Feels like: 66°F
Precip: 60%
World Resorts Switzerland Lake Geneva Weather

7 Day Weather Forecast

09.08
tue
DAY
82°F
NE 7 mph
precip
1%
NIGHT
62°F
N 6 mph
precip
66%
09.09
wed
DAY
50°F
S 5 mph
precip
88%
NIGHT
48°F
S 6 mph
precip
33%
09.10
thu
DAY
54°F
SE 4 mph
precip
29%
NIGHT
56°F
W 2 mph
precip
15%
09.11
fri
DAY
58°F
S 4 mph
precip
18%
NIGHT
58°F
W 5 mph
precip
24%
09.12
sat
DAY
60°F
S 7 mph
precip
27%
NIGHT
58°F
W 4 mph
precip
5%
09.13
sun
DAY
64°F
S 5 mph
precip
2%
NIGHT
62°F
W 4 mph
precip
4%
09.14
mon
DAY
66°F
NE 7 mph
precip
6%
NIGHT
60°F
W 4 mph
precip
9%

Lake Geneva Sea Water Temperature in September, °F

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Lake Geneva was 20.0°F. The maximum and minimum values were 18.4°F and 21.8°F respectively.

Lake Geneva on the Weather Map

Best Time to Visit Lake Geneva
The most sunny months:
August 18 days
July 16 days
September 16 days
The most warm months:
August 77.2 °F
July 76.8 °F
June 72.0 °F
Warmest sea temperature:
August 72.5 °F
July 71.1 °F
September 67.6 °F
The most cold months:
January 37.4 °F
December 40.2 °F
February 41.2 °F
The most rainy months:
June 7 days
May 7 days
December 6 days
The most windy months:
January 6 mph
February 6 mph
December 6 mph
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