21.09
mon
mon
Day
61°F
NE 12 mph
Precip.
17%
17%
Night
59°F
NE 12 mph
Precip.
25%
25%
22.09
tue
tue
Day
63°F
NE 8 mph
Precip.
7%
7%
Night
59°F
NE 6 mph
Precip.
12%
12%
23.09
wed
wed
Day
64°F
SE 4 mph
Precip.
4%
4%
Night
61°F
NE 6 mph
Precip.
9%
9%
24.09
thu
thu
Day
63°F
NE 7 mph
Precip.
17%
17%
Night
61°F
E 14 mph
Precip.
14%
14%
25.09
fri
fri
Day
61°F
E 11 mph
Precip.
9%
9%
Night
57°F
NE 7 mph
Precip.
11%
11%
26.09
sat
sat
Day
61°F
NE 9 mph
Precip.
16%
16%
Night
57°F
E 12 mph
Precip.
20%
20%
27.09
sun
sun
Day
61°F
E 16 mph
Precip.
5%
5%
Night
59°F
SE 9 mph
Precip.
13%
13%
sea water
temperature
temperature
| San Francisco |
monthly
weather
weather
| San Francisco |
current
weather
weather
| San Francisco |
14 days
forecast
forecast
| San Francisco |
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 64.6°F. The highest and lowest sea temperatures during the month were 67.6°F and 62.2°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 63.8°F. The highest and lowest sea temperatures during the month were 65.3°F and 62.4°F.
Air temperature in San Francisco, °F
Precipitation total in San Francisco, in.
* Charts above show average data for the last 3 years.
Best time for vacation in San Francisco
San Francisco on a weather map
Places in USA:
Name
°F
24 Hours Forecast
San Francisco
Local time: 19:39
September 21, monday
2100
59°F
NE
12 mph
12 mph
September 22, tuesday
0000
59°F
NE
12 mph
12 mph
0300
59°F
N
9 mph
9 mph
0600
57°F
N
6 mph
6 mph
0900
59°F
NE
4 mph
4 mph
1200
63°F
NE
8 mph
8 mph
1500
63°F
E
11 mph
11 mph
1800
61°F
E
11 mph
11 mph
