Measurements:
°C
°F
Lake Geneva
52°F
N 12 mph
Feels like: 48°F
Precip: 0%
World Resorts USA Lake Geneva Weather

Lake Geneva Sea Water Temperature

Current Sea Water Temperature:
+30.0°F
Maximum Sea Water Temperature in January: 41.0°F
Minimum Sea Water Temperature in January: 30.0°F
Average water temperature in January: 31.9°F

Sea Water Temperature for the Last 10 Days:

January 08 30.0°F January 03 30.0°F
January 07 30.0°F January 02 30.0°F
January 06 30.0°F January 01 30.0°F
January 05 30.0°F December 31 30.0°F
January 04 30.0°F December 30 30.0°F

When is the Warmest Sea for Lake Geneva?

According to our data for the last three years for Lake Geneva the highest average sea water temperature was in August, September and July.

Average Water Temperature by Month, °F

Sea Water Temperature in August

Select Year: 2025 2024 2023

The average sea surface temperature in August 2025 for Lake Geneva was 30.0°F. The maximum and minimum values were 30.0°F and 30.0°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Lake Geneva was 30.0°F. The maximum and minimum values were 30.0°F and 30.0°F respectively.

Sea Water Temperature in July

Select Year: 2025 2024 2023

The average sea surface temperature in July 2025 for Lake Geneva was 30.0°F. The maximum and minimum values were 30.0°F and 30.0°F respectively.

Best Time to Visit Lake Geneva
The most sunny months:
September 15 days
October 13 days
August 13 days
The most warm months:
July 82.2 °F
August 81.7 °F
June 78.7 °F
Warmest sea temperature:
August 51.2 °F
October 45.6 °F
July 42.8 °F
The most cold months:
January 24.4 °F
February 27.6 °F
December 31.7 °F
The most rainy months:
May 3 days
April 3 days
June 2 days
The most windy months:
March 11 mph
April 11 mph
November 11 mph

Lake Geneva on the Weather Map

USA Resorts:
NAME
Chicago +54
Hawaii +78
Honolulu +78
Houston +78
Las Vegas +54
Los Angeles +58
Maui +72
Miami +86
Miami Beach +80
New York +52
San Diego +64
San Francisco +52
Sarasota +82
Tampa +88
Washington +60
24 Hours Weather Forecast
Lake Geneva
Local time: 14:32
08 jan, thursday
1500 52°F
N
12 mph
1800 40°F
NW
16 mph
2100 40°F
N
22 mph
09 jan, friday
0000 44°F
NE
22 mph
0300 48°F
NE
15 mph
0600 48°F
SE
12 mph
0900 38°F
SE
11 mph
1200 36°F
S
12 mph