Measurements:
°C
°F
Lake Geneva
58°F
S 4 mph
Feels like: 58°F
Precip: 19%
World Resorts Switzerland Lake Geneva Weather

Lake Geneva Sea Water Temperature

Current Sea Water Temperature:
+64.4°F
Maximum Sea Water Temperature in October: 70.6°F
Minimum Sea Water Temperature in October: 30.0°F
Average water temperature in October: 60.1°F

Sea Water Temperature for the Last 10 Days:

October 19 64.4°F October 14 65.6°F
October 18 65.0°F October 13 66.0°F
October 17 65.6°F October 12 67.2°F
October 16 65.8°F October 11 67.0°F
October 15 65.0°F October 10 67.0°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, July and September.

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 78.6°F. The maximum and minimum values were 75.8°F and 80.8°F respectively.

Sea Water Temperature in July

Select Year: 2026 2025 2024

The average sea surface temperature in July 2026 for Lake Geneva was 77.5°F. The maximum and minimum values were 74.8°F and 80.2°F respectively.

Sea Water Temperature in September

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Lake Geneva was 73.1°F. The maximum and minimum values were 69.6°F and 78.8°F respectively.

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 67.9 °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

Lake Geneva on the Weather Map

Switzerland Resorts:
NAME
F°
Berne +54
Geneva +54
Gstaad +58
Lake Geneva +58
Lausanne +54
Lugano +68
Montreux +58
Spitz +60
St Gallen +54
St Moritz +48
Verbier +42
Vevey +58
Winterthur +56
Zermatt +32
Zurich +54
24 Hours Weather Forecast
Lake Geneva
Local time: 11:05
19 oct, monday
1200 58°F
S
4 mph
1500 62°F
S
6 mph
1800 56°F
S
4 mph
2100 44°F
SW
2 mph
20 oct, tuesday
0000 44°F
W
2 mph
0300 46°F
W
4 mph
0600 46°F
W
3 mph
0900 46°F
NW
2 mph