Measurements:
°C
°F
Lake Geneva
38°F
SW 6 mph
Feels like: 34°F
Precip: 0%
World Resorts Switzerland Lake Geneva Weather

Lake Geneva Sea Water Temperature

Current Sea Water Temperature:
+44.0°F
Maximum Sea Water Temperature in February: 46.4°F
Minimum Sea Water Temperature in February: 30.0°F
Average water temperature in February: 42.4°F

Sea Water Temperature for the Last 10 Days:

February 02 44.0°F January 28 44.4°F
February 01 44.2°F January 27 44.6°F
January 31 44.6°F January 26 44.2°F
January 30 44.0°F January 25 44.2°F
January 29 44.2°F January 24 44.4°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: 2025 2024 2023

The average sea surface temperature in August 2025 for Lake Geneva was 75.0°F. The maximum and minimum values were 72.0°F and 78.4°F respectively.

Sea Water Temperature in July

Select Year: 2025 2024 2023

The average sea surface temperature in July 2025 for Lake Geneva was 74.3°F. The maximum and minimum values were 71.6°F and 77.0°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Lake Geneva was 70.0°F. The maximum and minimum values were 66.8°F and 73.6°F respectively.

Best Time to Visit Lake Geneva
The most sunny months:
August 19 days
July 16 days
September 16 days
The most warm months:
August 77.1 °F
July 76.3 °F
June 71.6 °F
Warmest sea temperature:
August 72.0 °F
July 70.7 °F
September 67.6 °F
The most cold months:
January 37.4 °F
December 40.2 °F
February 40.8 °F
The most rainy months:
June 7 days
May 7 days
July 6 days
The most windy months:
January 6 mph
February 6 mph
December 6 mph

Lake Geneva on the Weather Map

Switzerland Resorts:
NAME
Basle +38
Berne +30
Geneva +36
Gstaad +14
Lake Geneva +38
Lausanne +38
Lucerne +26
Lugano +36
Montreux +24
St Gallen +32
St Moritz +12
Verbier +10
Vevey +24
Winterthur +32
Zurich +32
24 Hours Weather Forecast
Lake Geneva
Local time: 00:45
03 feb, tuesday
0300 36°F
SW
5 mph
0600 36°F
NE
9 mph
0900 38°F
NE
11 mph
1200 40°F
NE
7 mph
1500 42°F
E
6 mph
1800 38°F
S
3 mph
2100 36°F
SW
2 mph
04 feb, wednesday
0000 34°F
SW
3 mph