World Resorts Switzerland Lake Geneva Weather

Lake Geneva Sea Temperature in December

Average sea water temperature in December:
+48.5°F
Minimum sea water temperature in December: 53.4°F
Maximum sea water temperature in December: 44.2°F

Daily sea water temperature in December, °F

Show year:
2025
2024
2023

The average sea water temperature in December of 2025 was 48.3°F. The highest and lowest sea temperatures during the month were 50.0°F and 45.7°F.

Monthly sea water temperature in Lake Geneva, °F

Which Switzerland resorts have warmest sea in December?

Place name December 2025 December 2024
Geneva 49.4°F 49.5°F
Lake Geneva 48.3°F 49.0°F
Lausanne 48.2°F 48.9°F
Vevey 48.1°F 49.0°F
Montreux 48.1°F 48.9°F
Gstaad 48.1°F 48.9°F
Verbier 48.1°F 48.9°F
St Gallen 45.6°F 46.0°F
Winterthur 45.3°F 45.8°F
Zurich 45.3°F 45.8°F

Best time for vacation in Lake Geneva

Sunniest months:
August 19 days
July 16 days
September 16 days
Warmest months:
August 74.4 °F
July 73.7 °F
June 69.5 °F
Warmest sea temp:
August 69.8 °F
July 68.6 °F
September 65.8 °F
Coldest months:
January 38.6 °F
December 41.2 °F
February 41.8 °F
Rainiest months:
June 7 days
May 7 days
July 6 days
Windiest months:
January 6.5 mph
February 6.0 mph
December 5.8 mph

Lake Geneva on a weather map

Current weather
14:19
Lake Geneva
+43°F
N 4 mph
Feels like: +41°F
Precip.: 0%
Places in Switzerland:
Name
°F
Basle
+39°F
Berne
+39°F
Vevey
+37°F
Verbier
+37°F
Winterthur
+39°F
Gstaad
+36°F
Geneva
+43°F
Lake Geneva
+43°F
Lausanne
+43°F
Lugano
+43°F
Lucerne
+41°F
Montreux
+37°F
St Gallen
+37°F
St Moritz
+21°F
Zurich
+39°F
all places
24 Hours Forecast
Lake Geneva
Local time: 14:19
January 12, monday
1500
43°F
N
4 mph
1800
41°F
NE
2 mph
2100
39°F
NE
2 mph
January 13, tuesday
0000
39°F
NE
4 mph
0300
39°F
NE
4 mph
0600
37°F
NE
3 mph
0900
37°F
E
1 mph
1200
43°F
E
2 mph
Units of measurement: °C / °F