San Francisco weather in March
Temperature, sea and sunshine in March: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in March
Good
Best time to visit: April – October
What is the weather like in San Francisco in March?
In March, San Francisco is cool: daytime highs average 16 °C, and nights cool down to about 8 °C. The sea averages 11.8 °C – swimming is only for the hardy. The sun shines for around 8 hours a day. Rain falls on about 9 days, adding up to 67 mm. All in all, March is a good month for a holiday in San Francisco.
March compared
How the weather changes from February to April. Tap a month to open it.
| FebruaryFeb | MarchMar | AprilApr | |
|---|---|---|---|
| Score | 65 | 75 | 94 |
| Day | 15° | 16° | 17° |
| Night | 7° | 8° | 9° |
| Sea | 12° | 12° | 11° |
| Sun | 7 h | 8 h | 10 h |
| Rain days | 9 | 9 | 5 |
More details for March
- Daylight
- 11 h 53 min07:23 – 19:16
- UV index
- 6 · highclear sky, noon (estimate)
- Muggy days
- 0 daysdew point 18 °C or more
- Wind
- 17 km/haverage daily peak
- Cloud cover
- 56 %on average
- Hot days
- 0 days30 °C or more
- Time zone
- UTC−7America/Los_Angeles
How the score comes together
- Temperatureweight 50 %77 %
- Sunshineweight 20 %80 %
- Few rainy daysweight 30 %67 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in March
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
San Francisco in March: quick answers
Is San Francisco hot in March?
No. In March, San Francisco is cool: daytime highs average 16 °C and nights drop to about 8 °C.
Can you swim in San Francisco in March?
Only if you don't mind cold water: in March the sea averages just 11.8 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in San Francisco in March?
Rain falls on about 9 days, adding up to 67 mm.
San Francisco month by month
The whole year in San FranciscoAll destinations: USA
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, GeoNames (CC BY 4.0)