San Diego Weather in May
“Mild and bright — an underrated time to visit.”
Roughly 4 rainy days across the month, on average.
May in San Diego delivers a delightful coastal transition into summer. With daytime temperatures comfortably averaging a high of 20°C and refreshing evening lows around 14.2°C, the climate invites relaxed outdoor living from morning until dusk.
While coastal mornings occasionally bring mild marine cloud cover, skies routinely clear to deliver an impressive 11 hours of daily sunshine. Rain is practically absent, totaling just 15mm across roughly 3.7 days, ensuring dry paths and dependable conditions for coastal exploration.
The city runs on microclimates: it can be 18C and foggy in Ocean Beach while it's 32C and dry in El Cajon, 20 miles apart. Locals never say 'San Diego' for their neighborhood — it's Hillcrest, North Park, Barrio Logan, or PB. The Convoy district in Kearny Mesa has better Sichuan and Korean food than anywhere in LA, and no tourist ever finds it. 'Freeway' takes 'the' — 'the 5,' 'the 805.'
What to pack for San Diego in May
- Lightweight layers such as cotton t-shirts and breathable linen shirts
- Light knit sweater or denim jacket for breezy evenings by the ocean
- Comfortable walking sneakers or supportive sandals
- Polarized sunglasses and wide-brim sun hat
- Light windbreaker for coastal strolls and harbor cruises
What to pack for San Diego in May
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Where to stay in San Diego
We don't review individual hotels — plenty of people do that well. What we do is send you to compare rooms in San Diego across trusted platforms.
Compare hotels on Booking.com→Estimated May trip to San Diego
Shoulder-season pricing — a balance of price and conditions. Rule-based estimates from a couple based in London — actual prices vary.
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Things worth doing
Spend unhurried afternoons exploring the Spanish-Renaissance architecture and outdoor gardens of Balboa Park, or wander the scenic coastal paths around La Jolla Cove. With calm weather and clear skies by midday, it is also a fantastic month for kayaking, paddleboarding, or harbor sailing.
May vs. the rest of the year
How this month compares in San Diego. Tap any month to read more.
highlighted months are among the best time to visit.
Best time to visit San Diego
While May has its own character in San Diego, the data-backed best months to visit San Diego are April, June, July, August. These months combine the most favourable temperatures, rainfall, and sunshine across an 11-year climate record (2015–2025).
See the full best-time-to-visit guide for San DiegoOther places with a similar climate right now
San Diego in May — FAQ
Q01Should I visit San Diego in May?
Should I visit San Diego in May?
Yes — this is one of the best months of the year to visit. In May, San Diego averages a high of 20°C (68°F) and a low of 14°C (57°F), with 15mm of rainfall across roughly 4 rainy days. September-October see the marine layer finally burn off by 10am and water temperatures peak at 21C, prime for La Jolla Cove snorkeling with leopard sharks.
Q02What temperatures should I expect in San Diego during May?
What temperatures should I expect in San Diego during May?
The average high temperature in San Diego during May is 20°C (68°F), with an average low of 14°C (57°F). These figures are averaged from 11 complete years of daily records (2015–2025, Open-Meteo Archive).
Q03Is May a rainy month in San Diego?
Is May a rainy month in San Diego?
San Diego averages approximately 4 rainy days in May, with a total monthly rainfall of about 15mm. This is based on daily precipitation records where days with 1mm or more of rain are counted as rainy days.
Q04How should I dress for San Diego in May?
How should I dress for San Diego in May?
For San Diego in May, pack layered clothing for changing temperatures, sunscreen and sunglasses, comfortable walking shoes. These recommendations are based on 11 complete years of weather averages for this specific month. Light hoodie for June Gloom evenings — the marine layer drops temperatures 10 degrees after sunset even in summer.
Q05Is May a busy travel month for San Diego?
Is May a busy travel month for San Diego?
Tourist crowds in San Diego during May are typically moderate — shoulder season, a sweet spot between crowds and weather. Consider this when planning accommodation — prices track crowd levels closely. The city runs on microclimates: it can be 18C and foggy in Ocean Beach while it's 32C and dry in El Cajon, 20 miles apart. Locals never say 'San Diego' for their neighborhood — it's Hillcrest, North Park, Barrio Logan, or PB. The Convoy district in Kearny Mesa has better Sichuan and Korean food than anywhere in LA, and no tourist ever finds it. 'Freeway' takes 'the' — 'the 5,' 'the 805.'