Measurements:
°C
°F
Lake Geneva
40°F
E 29 mph
Feels like: 26°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 March: 37.4°F
Minimum Sea Water Temperature in March: 30.0°F
Average water temperature in March: 32.2°F

Sea Water Temperature for the Last 10 Days:

March 13 30.0°F March 08 30.0°F
March 12 30.0°F March 07 30.0°F
March 11 30.0°F March 06 30.0°F
March 10 30.0°F March 05 30.0°F
March 09 30.0°F March 04 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 23.7 °F
February 28.8 °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 +42
Hawaii +76
Honolulu +76
Houston +82
Las Vegas +96
Los Angeles +100
Maui +70
Miami +84
Miami Beach +82
New York +42
San Diego +94
San Francisco +72
Sarasota +80
Tampa +80
Washington +56
24 Hours Weather Forecast
Lake Geneva
Local time: 16:06
13 mar, friday
1800 36°F
SE
24 mph
2100 30°F
SE
17 mph
14 mar, saturday
0000 28°F
SE
11 mph
0300 28°F
SE
5 mph
0600 26°F
S
2 mph
0900 26°F
W
3 mph
1200 26°F
N
6 mph
1500 30°F
NW
7 mph