Measurements:
°C
°F
Lake Geneva
60°F
SW 2 mph
Feels like: 62°F
Precip: 3%
World Resorts USA Lake Geneva Weather

Lake Geneva Sea Water Temperature

Current Sea Water Temperature:
+30.0°F
Maximum Sea Water Temperature in October: 68.0°F
Minimum Sea Water Temperature in October: 30.0°F
Average water temperature in October: 44.4°F

Sea Water Temperature for the Last 10 Days:

October 05 30.0°F September 30 30.0°F
October 04 30.0°F September 29 30.0°F
October 03 30.0°F September 28 30.0°F
October 02 30.0°F September 27 30.0°F
October 01 30.0°F September 26 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 October.

Average Water Temperature by Month, °F

Sea Water Temperature in August

Select Year: 2026 2025 2024

The average sea surface temperature in August 2026 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: 2026 2025 2024

The average sea surface temperature in September 2026 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 October

Select Year: 2025 2024 2022

The average sea surface temperature in October 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:
June 13 days
August 13 days
September 13 days
The most warm months:
July 83.4 °F
August 81.8 °F
June 78.9 °F
Warmest sea temperature:
August 46.9 °F
October 45.6 °F
July 39.6 °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
September 2 days
The most windy months:
March 11 mph
April 11 mph
November 11 mph

Lake Geneva on the Weather Map

USA Resorts:
NAME
F°
Boston +58
Chicago +62
Hawaii +82
Houston +86
Las Vegas +92
Los Angeles +100
Maui +74
Miami +88
Myrtle Beach +70
New York +62
San Diego +84
San Francisco +66
Santa Monica +94
Sarasota +84
Washington +64
24 Hours Weather Forecast
Lake Geneva
Local time: 18:52
05 oct, monday
2100 50°F
NW
7 mph
06 oct, tuesday
0000 48°F
NW
7 mph
0300 48°F
N
7 mph
0600 48°F
N
8 mph
0900 56°F
N
12 mph
1200 68°F
NE
16 mph
1500 70°F
NE
17 mph
1800 64°F
NE
14 mph