Current sea water temperature:
+54.3°F
| Minimum sea water temperature in January: | 56.7°F |
| Maximum sea water temperature in January: | 49.6°F |
| Average sea water temperature in January: | 52.4°F |
| more information | |
14 days
forecast
forecast
| San Francisco |
monthly
weather
weather
| San Francisco |
Sea water temperature for the last 10 days:
| December 31 | 54.3°F | December 26 | 55.0°F |
| December 30 | 54.7°F | December 25 | 54.9°F |
| December 29 | 54.3°F | December 24 | 54.5°F |
| December 28 | 55.6°F | December 23 | 54.3°F |
| December 27 | 55.8°F | December 22 | 53.8°F |
Monthly sea water temperature, °F
When is the warmest sea in San Francisco?
Based on the data about daily sea water temperature for the last three years the warmest sea in San Francisco was noticed in September, August and October.
Monthly Sea Temperatures in San Francisco, °F
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 64.8°F. The highest and lowest sea temperatures during the month were 66.9°F and 62.2°F.
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 63.8°F. The highest and lowest sea temperatures during the month were 65.1°F and 62.4°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.
current
weather
weather
| San Francisco |
weather in
January
January
| San Francisco |
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: 15:31
December 31, wednesday
1800
50°F
SW
6 mph
6 mph
2100
50°F
SW
8 mph
8 mph
January 01, thursday
0000
50°F
SW
7 mph
7 mph
0300
52°F
SW
7 mph
7 mph
0600
52°F
SW
9 mph
9 mph
0900
52°F
SW
8 mph
8 mph
1200
52°F
SW
7 mph
7 mph
1500
54°F
SW
7 mph
7 mph
