Current sea water temperature:
+45.9°F
| Minimum sea water temperature in December: | 53.4°F |
| Maximum sea water temperature in December: | 44.2°F |
| Average sea water temperature in December: | 48.5°F |
| more information | |
14 days
forecast
forecast
| Lake Geneva |
monthly
weather
weather
| Lake Geneva |
Sea water temperature for the last 10 days:
| December 30 | 45.9°F | December 25 | 47.3°F |
| December 29 | 45.7°F | December 24 | 46.8°F |
| December 28 | 45.7°F | December 23 | 47.3°F |
| December 27 | 46.2°F | December 22 | 47.7°F |
| December 26 | 46.8°F | December 21 | 48.2°F |
Monthly sea water temperature, °F
When is the warmest sea in Lake Geneva?
Based on the data about daily sea water temperature for the last three years the warmest sea in Lake Geneva was noticed in August, July and September.
Monthly Sea Temperatures in Lake Geneva, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 72.5°F. The highest and lowest sea temperatures during the month were 75.6°F and 69.8°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 71.8°F. The highest and lowest sea temperatures during the month were 74.3°F and 69.4°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 68.0°F. The highest and lowest sea temperatures during the month were 71.2°F and 65.1°F.
current
weather
weather
| Lake Geneva |
weather in
January
January
| Lake Geneva |
Best time for vacation in Lake Geneva
Lake Geneva on a weather map
Places in Switzerland:
Name
°F
24 Hours Forecast
Lake Geneva
Local time: 21:46
December 31, wednesday
0000
28°F
SW
19 mph
19 mph
0300
27°F
SW
18 mph
18 mph
0600
27°F
SW
16 mph
16 mph
0900
25°F
SW
14 mph
14 mph
1200
30°F
SW
14 mph
14 mph
1500
32°F
SW
12 mph
12 mph
1800
28°F
S
9 mph
9 mph
2100
28°F
S
7 mph
7 mph
