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San Francisco in March: weather, sea & travel advice
This month's data profile
Clear transition month
San Francisco in March is climatically well suited to city breaks and active holidays and hiking. The average daily high is around 16 °C, and the sea is about 12 °C. With about 10 rainy days it is wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
48/100 · #9
Warmth
#9
Dryness
#9
Sun
#7
Sea warmth
#8
Published best categories: none
San Francisco · MarchPhoto: Dale Cruse · CC BY 2.0Climate facts
- Average high
- 16 °C
- Average low
- 8 °C
- Sea
- 12 °C
- Rainy days (est.)
- 10 rainy days (est.)
- Sun (est.)
- 6 h/day
- Humidity
- 82 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| February | 14 | 7 | 10 | 113 | 4.1 | 83 | 2.3 | 12 | 43 |
| March (selected) | 16 | 8 | 10 | 85 | 5.7 | 82 | 2.3 | 12 | 48 |
| April | 17 | 8 | 6 | 37 | 7.7 | 80 | 2.4 | 11 | 61 |
How do the previous and next months compare?
Baseline: March (48/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| February | -5 | -1.2 °C | -0.7 °C | +0.1 | +27.3 mm | -1.6 h | +0.8 % | ±0 m/s | ±0 °C |
| April | +13 | +1.5 °C | +0.6 °C | -4.7 | -48.7 mm | +2 h | -2.2 % | +0.1 m/s | -0.5 °C |
All twelve months in context
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Useful next decisions
Frequently asked questions
How warm is San Francisco in March?
The average daily high is around 16 °C, with an average daily low of about 8 °C.
Can you swim in San Francisco in March?
The sea is about 12 °C (cold).
Does it rain a lot in San Francisco in March?
The curated estimate is about 10 rainy days per month, not a directly measured long-term average. Total precipitation averages around 85 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit San Francisco?
By the climate score, July, August, September and October are the strongest months for San Francisco. For a beach trip: July, August and September. March is not among them.