17.09
thu
thu
Day
63°F
SW 7 mph
Precip.
2%
2%
Night
57°F
N 2 mph
Precip.
14%
14%
18.09
fri
fri
Day
63°F
SW 3 mph
Precip.
1%
1%
Night
55°F
NW 1 mph
Precip.
9%
9%
19.09
sat
sat
Day
63°F
SW 5 mph
Precip.
4%
4%
Night
59°F
NW 2 mph
Precip.
19%
19%
20.09
sun
sun
Day
66°F
S 6 mph
Precip.
1%
1%
Night
63°F
W 2 mph
Precip.
7%
7%
21.09
mon
mon
Day
68°F
SW 9 mph
Precip.
6%
6%
Night
61°F
SW 19 mph
Precip.
4%
4%
22.09
tue
tue
Day
64°F
SW 17 mph
Precip.
2%
2%
Night
61°F
SW 9 mph
Precip.
9%
9%
23.09
wed
wed
Day
63°F
S 5 mph
Precip.
3%
3%
Night
61°F
SW 6 mph
Precip.
6%
6%
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 71.7°F. The highest and lowest sea temperatures during the month were 75.2°F and 68.9°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 60.7°F. The highest and lowest sea temperatures during the month were 63.9°F and 57.6°F.
Air temperature in Geneva, °F
Precipitation total in Geneva, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Geneva
Geneva on a weather map
Places in Switzerland:
Name
°F
24 Hours Forecast
Geneva
Local time: 15:58
September 17, thursday
1800
66°F
SW
4 mph
4 mph
2100
61°F
E
2 mph
2 mph
September 18, friday
0000
57°F
N
2 mph
2 mph
0300
55°F
N
2 mph
2 mph
0600
54°F
N
2 mph
2 mph
0900
52°F
N
1 mph
1 mph
1200
63°F
SW
3 mph
3 mph
1500
68°F
SW
6 mph
6 mph
