World Resorts Switzerland Lake Geneva Weather

Lake Geneva Sea Temperature in September

Average sea water temperature in September:
+66.1°F
Minimum sea water temperature in September: 75.9°F
Maximum sea water temperature in September: 32.0°F

Daily sea water temperature in September, °F

Show year:
2026
2025
2024

The average sea water temperature in September of 2026 was 72.5°F. The highest and lowest sea temperatures during the month were 75.9°F and 69.6°F.

Monthly sea water temperature in Lake Geneva, °F

Which Switzerland resorts have warmest sea in September?

Place name September 2026 September 2025
Vevey 73.2°F 68.4°F
Gstaad 73.1°F 68.5°F
Verbier 73.1°F 68.5°F
Montreux 73.1°F 68.5°F
Lausanne 72.7°F 68.1°F
Lake Geneva 72.5°F 68.0°F
Geneva 71.7°F 66.9°F
Winterthur 71.7°F 67.6°F
Zurich 71.6°F 67.6°F
St Gallen 71.3°F 66.8°F

Best time for vacation in Lake Geneva

Sunniest months:
August 18 days
July 16 days
September 16 days
Warmest months:
August 74.5 °F
July 74.1 °F
June 69.8 °F
Warmest sea temp:
August 70.2 °F
July 69.0 °F
September 65.8 °F
Coldest months:
January 38.6 °F
December 41.2 °F
February 42.1 °F
Rainiest months:
June 7 days
May 7 days
December 6 days
Windiest months:
January 6.4 mph
February 6.0 mph
December 5.8 mph

Lake Geneva on a weather map

Current weather
16:51
Lake Geneva
+59°F
S 4 mph
Feels like: +59°F
Precip.: 10%
Places in Switzerland:
Name
°F
Berne
+63°F
Vevey
+54°F
Verbier
+48°F
Winterthur
+64°F
Gstaad
+55°F
Geneva
+66°F
Lake Geneva
+59°F
Interlaken
+48°F
Lausanne
+63°F
Lugano
+63°F
Montreux
+54°F
St Gallen
+59°F
Zermatt
+45°F
Zurich
+63°F
Spitz
+54°F
all places
24 Hours Forecast
Lake Geneva
Local time: 16:51
September 17, thursday
1800
59°F
S
4 mph
2100
57°F
NW
3 mph
September 18, friday
0000
54°F
NW
3 mph
0300
54°F
NW
3 mph
0600
52°F
NW
3 mph
0900
50°F
SW
2 mph
1200
59°F
S
5 mph
1500
63°F
S
5 mph
Units of measurement: °C / °F