Measurements:
°C
°F
CURRENT WEATHER
01:18
San Francisco
50°F
E 4 mph
Feels like: 46°F
Precip: 0%
World Resorts USA San Francisco Weather

7 Day Weather Forecast

12.18
thu
DAY
52°F
E 1 mph
precip
0%
NIGHT
56°F
NE 3 mph
precip
0%
12.19
fri
DAY
56°F
NE 6 mph
precip
0%
NIGHT
56°F
NE 4 mph
precip
0%
12.20
sat
DAY
56°F
NE 6 mph
precip
0%
NIGHT
58°F
NE 19 mph
precip
100%
12.21
sun
DAY
58°F
NE 4 mph
precip
84%
NIGHT
56°F
SE 6 mph
precip
83%
12.22
mon
DAY
56°F
NW 4 mph
precip
0%
NIGHT
54°F
NE 5 mph
precip
100%
12.23
tue
DAY
54°F
SW 6 mph
precip
100%
NIGHT
56°F
NW 17 mph
precip
100%
12.24
wed
DAY
52°F
E 11 mph
precip
100%
NIGHT
50°F
NW 5 mph
precip
100%

San Francisco Sea Water Temperature in December, °F

Select Year: 2025 2024 2023

The average sea surface temperature in December 2025 for San Francisco was 12.8°F. The maximum and minimum values were 11.8°F and 13.9°F respectively.

San Francisco on the Weather Map

Best Time to Visit San Francisco
The most sunny months:
October 18 days
June 18 days
May 17 days
The most warm months:
August 67.2 °F
September 66.7 °F
October 65.7 °F
Warmest sea temperature:
September 63.4 °F
August 63.0 °F
October 61.8 °F
The most cold months:
December 54.7 °F
January 55.1 °F
February 56.1 °F
The most rainy months:
March 4 days
December 4 days
January 4 days
The most windy months:
May 9 mph
June 9 mph
April 9 mph
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