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:
78.5 °F
Average:
82.5 °F
Maximum:
84.4 °F
Sea water temperature in San Francisco in December
In the city of San Francisco, the month of December is a great time for swimming. The minimum recorded temperature during this month was 78.5°F on December 23, 2018, with an average temperature being 82.5°F and a maximum temperature reaching 84.4°F on December 12, 2020.
| Date | 10 years average | 2023 | 2022 |
|---|---|---|---|
| Dec 1 | 83.0°F | 83.5°F | 83.9°F |
| Dec 2 | 83.1°F | 83.2°F | 83.9°F |
| Dec 3 | 83.0°F | 83.4°F | 83.5°F |
| Dec 4 | 83.2°F | 83.6°F | 83.9°F |
| Dec 5 | 83.2°F | 83.6°F | 83.7°F |
| Dec 6 | 83.1°F | 83.5°F | 83.8°F |
| Dec 7 | 83.1°F | 83.6°F | 83.6°F |
| Dec 8 | 83.1°F | 83.3°F | 83.4°F |
| Dec 9 | 83.0°F | 82.8°F | 83.3°F |
| Dec 10 | 83.1°F | 83.3°F | 83.5°F |
| Dec 11 | 83.1°F | 83.5°F | 83.5°F |
| Dec 12 | 83.2°F | 83.7°F | 83.6°F |
| Dec 13 | 83.1°F | 83.6°F | 83.4°F |
| Dec 14 | 82.9°F | 83.6°F | 83.2°F |
| Dec 15 | 82.8°F | 83.2°F | 82.7°F |
| Dec 16 | 82.7°F | 82.8°F | 82.6°F |
| Dec 17 | 82.7°F | 83.0°F | 83.2°F |
| Dec 18 | 82.6°F | 83.0°F | 83.1°F |
| Dec 19 | 82.5°F | 82.9°F | 83.0°F |
| Dec 20 | 82.1°F | 82.5°F | 83.1°F |
| Dec 21 | 82.1°F | 82.6°F | 83.1°F |
| Dec 22 | 82.0°F | 83.1°F | 82.9°F |
| Dec 23 | 82.0°F | 83.0°F | 83.3°F |
| Dec 24 | 81.9°F | 83.1°F | 83.2°F |
| Dec 25 | 81.8°F | 82.9°F | 83.0°F |
| Dec 26 | 81.8°F | 82.6°F | 82.7°F |
| Dec 27 | 81.8°F | 82.6°F | 82.4°F |
| Dec 28 | 81.7°F | 82.6°F | 82.1°F |
| Dec 29 | 81.8°F | 82.9°F | 82.3°F |
| Dec 30 | 81.8°F | 83.1°F | 81.8°F |
| Dec 31 | 81.8°F | 82.6°F | 82.3°F |
In San Francisco, the water temperature is comfortable for swimming all year round.
The warmest water in San Francisco was recorded on October 7, 2023, reaching a 86.8°F. While the coldest temperature occurred on December 23, 2018, dipping to 78.5°F. The average readings by season are 81.7°F in Winter, 82.8°F in Spring, 84.8°F in Summer, and 84.5°F in Autumn.
December's average temperature is a slight drop from November's average of 83.9°F. In January, the temperature is expected to decrease further, potentially averaging around 81.5°F.
Popular neighboring cities and resorts
| City | Water temperature* | Distance** |
|---|---|---|
| San Francisco |
84.6°F
|
18mi |
| San Francisco |
84.2°F
|
27mi |
| San Jose |
83.4°F
|
29mi |
| San Juan |
84.0°F
|
38mi |
| Santa Monica |
84.7°F
|
45mi |
| Madrid |
84.8°F
|
51mi |
* current water temperature in this city
** straight line distance from San Francisco