Measurements:
°C
°F
Geneva
90°F
NE 11 mph
Feels like: 88°F
Precip: 0%
World Resorts Switzerland Geneva Weather

Geneva Sea Water Temperature

Current Sea Water Temperature:
+80.4°F
Maximum Sea Water Temperature in August: 81.8°F
Minimum Sea Water Temperature in August: 30.0°F
Average water temperature in August: 69.9°F

Sea Water Temperature for the Last 10 Days:

August 19 80.4°F August 14 80.8°F
August 18 80.8°F August 13 80.6°F
August 17 81.4°F August 12 80.4°F
August 16 81.8°F August 11 80.2°F
August 15 81.6°F August 10 78.2°F

When is the Warmest Sea for Geneva?

According to our data for the last three years for 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 Geneva was 79.9°F. The maximum and minimum values were 77.2°F and 81.8°F respectively.

Sea Water Temperature in July

Select Year: 2026 2025 2024

The average sea surface temperature in July 2026 for Geneva was 78.8°F. The maximum and minimum values were 75.8°F and 80.8°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Geneva was 68.7°F. The maximum and minimum values were 65.6°F and 71.6°F respectively.

Best Time to Visit Geneva
The most sunny months:
August 19 days
July 18 days
September 15 days
The most warm months:
August 79.7 °F
July 79.5 °F
June 75.4 °F
Warmest sea temperature:
August 69.6 °F
July 69.5 °F
September 66.0 °F
The most cold months:
January 37.2 °F
December 39.9 °F
February 41.9 °F
The most rainy months:
May 7 days
June 7 days
July 6 days
The most windy months:
January 5 mph
February 4 mph
April 4 mph

Geneva on the Weather Map

Switzerland Resorts:
NAME
Berne +86
Geneva +90
Gstaad +76
Interlaken +68
Lake Geneva +82
Lausanne +88
Lucerne +82
Lugano +82
Montreux +76
Spitz +78
St Gallen +88
Verbier +66
Vevey +76
Winterthur +86
Zurich +86
24 Hours Weather Forecast
Geneva
Local time: 19:18
19 aug, wednesday
2100 82°F
N
3 mph
20 aug, thursday
0000 76°F
N
7 mph
0300 70°F
N
8 mph
0600 68°F
N
5 mph
0900 68°F
NE
5 mph
1200 78°F
NE
9 mph
1500 88°F
E
9 mph
1800 80°F
E
10 mph