Current sea water temperature:
+49.1°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 18 | 49.1°F | December 13 | 48.7°F |
| December 17 | 48.0°F | December 12 | 49.1°F |
| December 16 | 48.2°F | December 11 | 49.1°F |
| December 15 | 48.4°F | December 10 | 49.3°F |
| December 14 | 48.6°F | December 9 | 49.5°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
December
December
| 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: 03:01
December 19, friday
0600
41°F
NE
1 mph
1 mph
0900
41°F
N
1 mph
1 mph
1200
48°F
N
1 mph
1 mph
1500
50°F
SE
3 mph
3 mph
1800
46°F
SW
1 mph
1 mph
2100
45°F
NE
1 mph
1 mph
December 20, saturday
0000
45°F
S
1 mph
1 mph
0300
45°F
S
1 mph
1 mph
