San Francisco in April
Find out everything about the water temperature in San Francisco in April. Average, minimum and maximum recorded temperatures as well as daily temperature in April for the last two years. Compare the current month's sea temperature data with other months of the year.
Water temperature in April
Minimum:
52.4 °F
Average:
56.5 °F
Maximum:
60.5 °F
Sea water temperature in San Francisco in April
In the city of San Francisco, the month of April is too cold for swimming. The minimum recorded temperature during this month was 52.4°F on April 2, 2023, with an average temperature being 56.5°F and a maximum temperature reaching 60.5°F on April 22, 2016.
| Date | 10 years average | 2024 | 2023 |
|---|---|---|---|
| Apr 1 | 55.9°F | 56.0°F | 52.5°F |
| Apr 2 | 55.9°F | 55.4°F | 52.4°F |
| Apr 3 | 56.2°F | 56.9°F | 53.5°F |
| Apr 4 | 56.2°F | 57.2°F | 53.5°F |
| Apr 5 | 56.0°F | 57.0°F | 53.4°F |
| Apr 6 | 56.0°F | 57.3°F | 52.7°F |
| Apr 7 | 55.7°F | 55.8°F | 52.6°F |
| Apr 8 | 56.0°F | 56.2°F | 52.7°F |
| Apr 9 | 56.4°F | 56.2°F | 52.9°F |
| Apr 10 | 56.5°F | 55.7°F | 53.3°F |
| Apr 11 | 56.6°F | 56.5°F | 54.0°F |
| Apr 12 | 56.6°F | 56.8°F | 55.6°F |
| Apr 13 | 56.6°F | 56.4°F | 54.9°F |
| Apr 14 | 56.6°F | 55.9°F | 56.0°F |
| Apr 15 | 56.4°F | 56.4°F | 54.5°F |
| Apr 16 | 56.4°F | 55.1°F | 54.1°F |
| Apr 17 | 56.3°F | 55.0°F | 54.5°F |
| Apr 18 | 56.4°F | 56.2°F | 54.7°F |
| Apr 19 | 56.3°F | 56.9°F | 55.0°F |
| Apr 20 | 56.3°F | 57.4°F | 54.2°F |
| Apr 21 | 56.8°F | 58.4°F | 54.2°F |
| Apr 22 | 56.9°F | 56.7°F | 54.6°F |
| Apr 23 | 57.0°F | 57.1°F | 55.1°F |
| Apr 24 | 57.1°F | 56.3°F | 55.9°F |
| Apr 25 | 57.1°F | 56.2°F | 55.8°F |
| Apr 26 | 57.1°F | 57.8°F | 55.5°F |
| Apr 27 | 56.8°F | 58.7°F | 56.6°F |
| Apr 28 | 57.0°F | 58.1°F | 57.1°F |
| Apr 29 | 57.1°F | 58.7°F | 57.1°F |
| Apr 30 | 57.1°F | 59.4°F | 56.7°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.
The average temperature in April is slightly warmer than March's average of 55.0°F. And in May, the temperature is expected to rise further, potentially reaching an average of 57.2°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