San Diego 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
Poor
Best time to visit: July – September
What is the weather like in San Diego in March?
In March, San Diego is mild: daytime highs average 18 °C, and nights cool down to about 10 °C. The sea averages 15.3 °C – swimming is only for the hardy. The sun shines for around 8 hours a day. Rain falls on about 6 days, adding up to 49 mm. All in all, March is not an ideal month for a holiday in San Diego.
March compared
How the weather changes from February to April. Tap a month to open it.
| FebruaryFeb | MarchMar | AprilApr | |
|---|---|---|---|
| Score | 29 | 34 | 40 |
| Day | 17° | 18° | 19° |
| Night | 9° | 10° | 12° |
| Sea | 15° | 15° | 16° |
| Sun | 7 h | 8 h | 9 h |
| Rain days | 7 | 6 | 4 |
More details for March
- Daylight
- 11 h 55 min07:01 – 18:56
- UV index
- 7 · highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or more
- Wind
- 17 km/haverage daily peak
- Cloud cover
- 48 %on average
- Hot days
- 0 days30 °C or more
- Time zone
- UTC−7America/Los_Angeles
How the score comes together
- Temperatureweight 35 %0 %
- Seaweight 25 %0 %
- Sunshineweight 20 %85 %
- Few rainy daysweight 20 %87 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in March
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
San Diego in March: quick answers
Is San Diego hot in March?
No. In March, San Diego is mild: daytime highs average 18 °C and nights drop to about 10 °C.
Can you swim in San Diego in March?
Only if you don't mind cold water: in March the sea averages just 15.3 °C. Comfortable swimming is possible from July to September.
Does it rain much in San Diego in March?
Rain falls on about 6 days, adding up to 49 mm.
San Diego month by month
The whole year in San DiegoAll destinations: USAWhere to go in MarchSea temperature in March
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0)