Current Sea Water Temperature:
+55.0°F
| Maximum Sea Water Temperature in December: | 60.2°F |
| Minimum Sea Water Temperature in December: | 50.2°F |
| Average water temperature in December: | 54.5°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| December 18 | 55.0°F | December 13 | 55.2°F |
| December 17 | 53.6°F | December 12 | 54.8°F |
| December 16 | 53.8°F | December 11 | 55.0°F |
| December 15 | 53.8°F | December 10 | 55.0°F |
| December 14 | 54.0°F | December 09 | 55.2°F |
When is the Warmest Sea for San Francisco?
According to our data for the last three years for San Francisco the highest average sea water temperature was in September, August and October.
Average Water Temperature by Month, °F
Sea Water Temperature in September
The average sea surface temperature in September 2025 for San Francisco was 66.4°F. The maximum and minimum values were 63.6°F and 68.8°F respectively.
Sea Water Temperature in August
The average sea surface temperature in August 2025 for San Francisco was 65.3°F. The maximum and minimum values were 63.8°F and 66.8°F respectively.
Sea Water Temperature in October
The average sea surface temperature in October 2025 for San Francisco was 65.4°F. The maximum and minimum values were 63.8°F and 67.0°F respectively.
USA Resorts:
NAME
F°
| Chicago |  |
+38 |
| Hawaii |  |
+76 |
| Honolulu | |
+76 |
| Houston |  |
+64 |
| Las Vegas | |
+50 |
| Los Angeles | |
+54 |
| Maui |  |
+72 |
| Miami | |
+72 |
| Miami Beach | |
+78 |
| New York | |
+30 |
| San Diego | |
+52 |
| San Francisco | |
+50 |
| Sarasota | |
+64 |
| Tampa | |
+62 |
| Washington | |
+30 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
San Francisco
Local time: 01:19
18 dec, thursday
| 0300 |  |
48°F | E 4 mph |
| 0600 |  |
50°F | E 2 mph |
| 0900 | |
52°F | N 2 mph |
| 1200 |  |
52°F | E 1 mph |
| 1500 | |
54°F | E 3 mph |
| 1800 | |
54°F | E 3 mph |
| 2100 | |
56°F | E 4 mph |
19 dec, friday
| 0000 | |
56°F | NE 3 mph |