San Diego in March
In March, San Diego averages 19°C (65°F) during the day and 11°C (51°F) at night, with around 11 days of rain (44 mm total).
High seasonConditions are comfortable for sightseeing without being sweltering. Plan for unsettled weather and bring rain gear.
March offers comfortable temperatures in San Diego, with some rain to plan around.
How March compares to the rest of the year in San Diego
March is in the middle of the year for warmth in San Diego (9th of 12) and one of the wettest months (1st of 12). Daytime temperature runs 3°C below the annual average (21°C). March runs roughly the same as February (18°C) and warms a further 2°C into April (20°C).
March sunrise & sunset in San Diego
Times shown for San Diego local time (America/Los_Angeles), calculated for the 15th of March. They shift by a few minutes day to day across the month.
Photography light in San Diego — March
Golden-hour and blue-hour windows for the 15th of March, in San Diego's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — San Diego in March
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on March's tier (High season) and San Diego's popularity.
Crowds & pricing — March in San Diego
This is a busy month in San Diego — not the absolute peak, but tourist numbers are clearly elevated. You'll feel it at headline attractions on weekends and in the historic centre, though side streets and lesser-known sights stay manageable. Prices are above off-season but not at their summit. A good week for first-time visitors who want everything open without the worst of the crush.
Why this tier: excellent tourism weather
Sun & mosquito risk — March in San Diego
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Sea temperature in San Diego — March
Across the year San Diego's sea swings from 14.7°C (February) to 21.5°C (August) — March sits at 15.4°C.
San Diego in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 18°C / 64°F | 9°C / 48°F | 62 mm | 8 | — |
| February | 18°C / 65°F | 9°C / 48°F | 48 mm | 8 | — |
| March | 19°C / 65°F | 11°C / 51°F | 44 mm | 11 | — |
| April | 20°C / 68°F | 13°C / 55°F | 22 mm | 8 | — |
| May | 20°C / 68°F | 14°C / 58°F | 16 mm | 9 | — |
| June | 22°C / 72°F | 16°C / 61°F | 2 mm | 4 | — |
| July | 25°C / 76°F | 18°C / 65°F | 5 mm | 2 | — |
| August | 26°C / 78°F | 19°C / 66°F | 9 mm | 3 | — |
| September | 26°C / 78°F | 18°C / 65°F | 11 mm | 5 | — |
| October | 24°C / 76°F | 16°C / 60°F | 10 mm | 5 | — |
| November | 21°C / 70°F | 12°C / 53°F | 28 mm | 6 | — |
| December | 18°C / 64°F | 9°C / 48°F | 63 mm | 8 | — |
Other cities with similar March weather
🌍 See the full ranked list of climate twins for San Diego in March →
Frequently asked questions
How hot is San Diego in March?
In March, San Diego averages a high of 19°C (65°F) and a low of 11°C (51°F) — generally mild and pleasant.
Does it rain a lot in San Diego in March?
March can be fairly wet in San Diego, with about 11 rainy days on average.
Is March a good time to visit San Diego?
March is mild and pleasant. It suits travelers who are comfortable with mild and pleasant weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for San Diego in March?
Pack light layers for warm days and cooler evenings, plus a compact umbrella or rain jacket. See the full March packing list for San Diego for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.