San Francisco in May
Find out everything about the water temperature in San Francisco in May. Average, minimum and maximum recorded temperatures as well as daily temperature in May for the last two years. Compare the current month's sea temperature data with other months of the year.
Water temperature in May
Minimum:
52.9 °F
Average:
57.2 °F
Maximum:
61.7 °F
Sea water temperature in San Francisco in May
In the city of San Francisco, the month of May is too cold for swimming. The minimum recorded temperature during this month was 52.9°F on May 29, 2014, with an average temperature being 57.2°F and a maximum temperature reaching 61.7°F on May 26, 2020.
| Date | 10 years average | 2024 | 2023 |
|---|---|---|---|
| May 1 | 57.0°F | 59.4°F | 57.1°F |
| May 2 | 57.0°F | 58.6°F | 56.1°F |
| May 3 | 57.0°F | 57.8°F | 56.2°F |
| May 4 | 57.2°F | 59.0°F | 56.4°F |
| May 5 | 56.9°F | 57.5°F | 57.1°F |
| May 6 | 56.6°F | 57.6°F | 56.6°F |
| May 7 | 56.5°F | 55.5°F | 56.0°F |
| May 8 | 56.8°F | 56.6°F | 56.4°F |
| May 9 | 56.9°F | 56.2°F | 55.4°F |
| May 10 | 57.1°F | 57.0°F | 55.6°F |
| May 11 | 57.0°F | 56.8°F | 56.0°F |
| May 12 | 57.0°F | 56.9°F | 56.4°F |
| May 13 | 57.0°F | 56.9°F | 56.2°F |
| May 14 | 57.1°F | 56.9°F | 56.8°F |
| May 15 | 57.0°F | 56.6°F | 58.1°F |
| May 16 | 56.9°F | 55.9°F | 57.6°F |
| May 17 | 57.0°F | 55.1°F | 56.0°F |
| May 18 | 56.8°F | 54.2°F | 54.7°F |
| May 19 | 56.6°F | 54.5°F | 54.9°F |
| May 20 | 57.1°F | 55.8°F | 55.6°F |
| May 21 | 57.1°F | 56.6°F | 54.5°F |
| May 22 | 57.3°F | 57.9°F | 54.5°F |
| May 23 | 57.4°F | 58.7°F | 55.7°F |
| May 24 | 57.5°F | 58.6°F | 57.6°F |
| May 25 | 57.5°F | 58.4°F | 57.5°F |
| May 26 | 57.5°F | 58.8°F | 58.4°F |
| May 27 | 57.6°F | 58.0°F | 59.0°F |
| May 28 | 58.1°F | 58.4°F | 59.3°F |
| May 29 | 58.0°F | 57.7°F | 58.3°F |
| May 30 | 58.4°F | 57.7°F | 60.1°F |
| May 31 | 58.2°F | 58.4°F | 59.3°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 May is slightly warmer than April's average of 56.5°F. And in June, the temperature is expected to rise further, potentially reaching an average of 59.4°F.
Popular neighboring cities and resorts
| City | Water temperature* | Distance** |
|---|---|---|
| Oakland |
54.3°F
|
8mi |
| Redwood City |
55.5°F
|
22mi |
| San Jose |
55.6°F
|
42mi |
* current water temperature in this city
** straight line distance from San Francisco