San Francisco in December
Find out everything about the water temperature in San Francisco in December. Average, minimum and maximum recorded temperatures as well as daily temperature in December for the last two years. Compare the current month's sea temperature data with other months of the year.
Water temperature in December
Minimum:
51.0 °F
Average:
54.4 °F
Maximum:
59.1 °F
Sea water temperature in San Francisco in December
In the city of San Francisco, the month of December is too cold for swimming. The minimum recorded temperature during this month was 51.0°F on December 22, 2022, with an average temperature being 54.4°F and a maximum temperature reaching 59.1°F on December 12, 2014.
| Date | 10 years average | 2023 | 2022 |
|---|---|---|---|
| Dec 1 | 56.2°F | 56.5°F | 54.3°F |
| Dec 2 | 55.8°F | 56.3°F | 53.8°F |
| Dec 3 | 55.8°F | 56.3°F | 53.5°F |
| Dec 4 | 55.5°F | 56.5°F | 53.3°F |
| Dec 5 | 55.5°F | 56.3°F | 53.6°F |
| Dec 6 | 55.3°F | 56.4°F | 53.2°F |
| Dec 7 | 55.2°F | 56.4°F | 53.1°F |
| Dec 8 | 55.0°F | 56.3°F | 52.6°F |
| Dec 9 | 55.0°F | 56.0°F | 52.7°F |
| Dec 10 | 55.0°F | 55.7°F | 52.9°F |
| Dec 11 | 55.0°F | 55.3°F | 52.8°F |
| Dec 12 | 54.9°F | 55.6°F | 52.6°F |
| Dec 13 | 54.8°F | 55.5°F | 52.5°F |
| Dec 14 | 54.7°F | 55.6°F | 52.1°F |
| Dec 15 | 54.6°F | 55.4°F | 51.6°F |
| Dec 16 | 54.5°F | 55.1°F | 52.0°F |
| Dec 17 | 54.4°F | 55.6°F | 51.7°F |
| Dec 18 | 54.2°F | 55.2°F | 51.5°F |
| Dec 19 | 54.0°F | 55.0°F | 51.5°F |
| Dec 20 | 53.8°F | 54.8°F | 51.5°F |
| Dec 21 | 53.8°F | 55.2°F | 51.3°F |
| Dec 22 | 53.7°F | 55.1°F | 51.0°F |
| Dec 23 | 53.9°F | 56.0°F | 51.1°F |
| Dec 24 | 53.7°F | 55.5°F | 51.3°F |
| Dec 25 | 53.6°F | 55.4°F | 51.4°F |
| Dec 26 | 53.5°F | 55.0°F | 51.6°F |
| Dec 27 | 53.4°F | 55.2°F | 51.4°F |
| Dec 28 | 53.3°F | 54.5°F | 51.8°F |
| Dec 29 | 53.1°F | 54.4°F | 51.0°F |
| Dec 30 | 53.1°F | 54.4°F | 51.3°F |
| Dec 31 | 52.9°F | 54.7°F | 51.5°F |
In an average year, San Francisco offers no days when the water temperature is warm enough to swim comfortably.
The warmest water in San Francisco was recorded on August 28, 2023, reaching a 67.4°F. While the coldest temperature occurred on March 4, 2023, dipping to 49.3°F. The average readings by season are 53.7°F in Winter, 56.2°F in Spring, 60.9°F in Summer, and 60.7°F in Autumn.
December's average temperature is a slight drop from November's average of 58.0°F. In January, the temperature is expected to decrease further, potentially averaging around 52.8°F.
Popular neighboring cities and resorts
| City | Water temperature* | Distance** |
|---|---|---|
| Oakland |
55.5°F
|
8mi |
| Redwood City |
65.5°F
|
22mi |
| San Jose |
63.2°F
|
42mi |
* current water temperature in this city
** straight line distance from San Francisco