San Francisco in January
Find out everything about the water temperature in San Francisco in January. Average, minimum and maximum recorded temperatures as well as daily temperature in January for the last two years. Compare the current month's sea temperature data with other months of the year.
Water temperature in January
Minimum:
70.5 °F
Average:
77.5 °F
Maximum:
81.0 °F
Sea water temperature in San Francisco in January
In the city of San Francisco, the month of January is a great time for swimming. The minimum recorded temperature during this month was 70.5°F on January 14, 2021, with an average temperature being 77.5°F and a maximum temperature reaching 81.0°F on January 21, 2020.
| Date | 10 years average | 2024 | 2023 |
|---|---|---|---|
| Jan 1 | 78.1°F | 79.4°F | 76.8°F |
| Jan 2 | 78.2°F | 79.3°F | 77.0°F |
| Jan 3 | 78.3°F | 79.2°F | 77.5°F |
| Jan 4 | 78.2°F | 79.3°F | 77.7°F |
| Jan 5 | 78.1°F | 79.2°F | 77.5°F |
| Jan 6 | 78.0°F | 79.3°F | 77.6°F |
| Jan 7 | 77.9°F | 78.9°F | 77.1°F |
| Jan 8 | 77.8°F | 78.7°F | 76.9°F |
| Jan 9 | 77.8°F | 78.4°F | 77.2°F |
| Jan 10 | 77.8°F | 78.2°F | 77.5°F |
| Jan 11 | 77.8°F | 77.9°F | 77.5°F |
| Jan 12 | 77.5°F | 78.1°F | 77.6°F |
| Jan 13 | 77.6°F | 77.8°F | 78.1°F |
| Jan 14 | 77.3°F | 77.5°F | 77.3°F |
| Jan 15 | 77.1°F | 77.2°F | 77.0°F |
| Jan 16 | 77.4°F | 77.7°F | 77.6°F |
| Jan 17 | 77.5°F | 78.0°F | 78.3°F |
| Jan 18 | 77.4°F | 77.7°F | 78.1°F |
| Jan 19 | 77.4°F | 77.6°F | 77.8°F |
| Jan 20 | 77.4°F | 78.2°F | 78.0°F |
| Jan 21 | 77.5°F | 78.7°F | 77.7°F |
| Jan 22 | 77.3°F | 78.5°F | 77.4°F |
| Jan 23 | 77.1°F | 77.6°F | 76.9°F |
| Jan 24 | 77.1°F | 78.2°F | 77.2°F |
| Jan 25 | 77.0°F | 77.8°F | 76.2°F |
| Jan 26 | 77.0°F | 78.4°F | 76.8°F |
| Jan 27 | 77.0°F | 77.9°F | 76.5°F |
| Jan 28 | 76.9°F | 78.2°F | 76.4°F |
| Jan 29 | 76.7°F | 78.4°F | 76.3°F |
| Jan 30 | 76.7°F | 78.1°F | 76.4°F |
| Jan 31 | 76.6°F | 77.8°F | 76.2°F |
In San Francisco, the water temperature is comfortable for swimming all year round.
The warmest water in San Francisco was recorded on July 31, 2023, reaching a 89.6°F. While the coldest temperature occurred on January 14, 2021, dipping to 70.5°F. The average readings by season are 78.1°F in Winter, 78.4°F in Spring, 85.8°F in Summer, and 85.8°F in Autumn.
January's average temperature is a slight drop from December's average of 80.0°F. In February, the temperature is expected to decrease further, potentially averaging around 76.7°F.