The month in detail
What to expect in March
Spring marks the start of the good season in San Diego. Temperatures rise (17°C) and tourists have not yet arrived en masse. Rain risk remains low (18% of days), leaving good room for outdoor activities. Not the best window, but acceptable if dates are constrained. July (9.2/10) is significantly better if possible.
March ranks 12 out of 12 months in San Diego.
This month's conditions
What it's like in March
UV index
6 · high
sunscreen and hat advised
Feels like
dry air
10°
Sea
17°C
cold, for the brave
Daylight
11.8h of daylight
Air quality
good
AQI 33
Compare
Is March the right month?
The best month in San Diego is July (9.2/10), 1.8 pt higher than March.
Book
Plan your trip
Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.
Stay
Hotels & rentals · San Diego
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Activities
Tours, tickets, experiences
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Flights
Multi-airline comparator
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🎟️ Activities & tours · San Diego
GetYourGuide selection · free cancellation
Practical info
What you need to know before you go
Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a beach holiday.
Country · United States
🗣️LanguageEnglish
💶CurrencyUS Dollar ($)
🚗DrivingRight-hand
🛡️Safety ⓘVery safe · 1/5
💰Cost of living ⓘExpensive · 4/5
🌡️ Climate
🌍Climate typeTemperate oceanic
📈Climate trend ⓘStable
🔥Hottest monthAugust · 25°C
❄️Coolest monthJanuary · 17°C
🌧️Rainiest month ⓘMarch · 18%
🏖️ Beach holiday
📅Peak seasonJuin → Sept
🏖️Swell (Sept–Mar) ⓘModérée
Explore
Other destinations in March
If March doesn't convince you for this destination, compare with others.
Similar climate
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EssaouiraMorocco
El HierroSpain
SantoriniGreece
Location
Where is San Diego ?
Global position + regional geographic context.
🌍 World
🔍 Geographic context
United StatesTemperate oceanic climate with a 9.2 → 7.4 gap between best and worst month. 10 years of ERA5 data to choose by project.
32.72°N · 117.16°W
Questions
Frequently asked questions
What is the best time to visit San Diego?
July is the best month with 24.0°C highs, 18.0°C lows, 9.8h of sunshine and 1.0% rainy days. The months of July & August offer comparable conditions.
How many hours of sunshine does San Diego get in July?
San Diego averages 9.8 sunshine hours per day in July. It is the sunniest month with a climate score of 8.8/10.
What is the rainiest month in San Diego?
January is the most unfavourable month with January has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in San Diego in July?
In July, overnight lows reach 18.0°C, while afternoon highs average 24.0°C.
Is San Diego good in winter?
In winter (December-February), San Diego scores 7.1/10 on average — Decent period conditions for cultural visits.. The best month overall remains July with a score of 8.8/10.
When should you avoid San Diego?
January is the most difficult month to visit San Diego, with January has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Can you swim in San Diego in March?
In March, the sea averages 17°C in San Diego: cold, for the brave. Best left to hardened swimmers or those with a wetsuit.
Do you need sun protection in San Diego in March?
The average UV index reaches 6 in March in San Diego (high), with about 11.8h of daylight. Sunscreen and hat advised.