18.12
thu
thu
Day
59°F
E 1 mph
Precip.
0%
0%
Night
55°F
NE 4 mph
Precip.
0%
0%
19.12
fri
fri
Day
55°F
N 7 mph
Precip.
0%
0%
Night
55°F
N 7 mph
Precip.
0%
0%
20.12
sat
sat
Day
55°F
NE 6 mph
Precip.
0%
0%
Night
57°F
NW 3 mph
Precip.
100%
100%
21.12
sun
sun
Day
57°F
N 6 mph
Precip.
71%
71%
Night
55°F
SE 6 mph
Precip.
83%
83%
22.12
mon
mon
Day
57°F
N 10 mph
Precip.
100%
100%
Night
57°F
N 11 mph
Precip.
100%
100%
23.12
tue
tue
Day
57°F
N 16 mph
Precip.
100%
100%
Night
54°F
NW 2 mph
Precip.
100%
100%
24.12
wed
wed
Day
54°F
SW 5 mph
Precip.
100%
100%
Night
52°F
SW 13 mph
Precip.
100%
100%
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 December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 55.0°F. The highest and lowest sea temperatures during the month were 57.0°F and 53.2°F.
Sea water temperature in January, °F
Show year:
2025
2024
2023
The average sea water temperature in January of 2025 was 52.7°F. The highest and lowest sea temperatures during the month were 53.4°F and 51.8°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: 18:00
December 18, thursday
2100
55°F
NE
3 mph
3 mph
December 19, friday
0000
55°F
NE
4 mph
4 mph
0300
54°F
NE
2 mph
2 mph
0600
55°F
NE
4 mph
4 mph
0900
55°F
N
6 mph
6 mph
1200
55°F
N
7 mph
7 mph
1500
55°F
NE
9 mph
9 mph
1800
55°F
NE
9 mph
9 mph
