San Diego Weather in August
“The kind of pleasant weather you build a trip around.”
Roughly 1 rainy days across the month, on average.
August is the quintessential peak of summer along Southern California's coastline. With daytime highs averaging a comfortable 25.6°C and virtually no rain—measuring a mere 8mm across roughly 0.6 rainy days—San Diego delivers nearly uninterrupted blue skies from dawn until dusk.
Basking in an impressive 11.7 hours of sunshine each day, the Pacific waters reach their most inviting temperatures of the year. Evenings remain pleasantly mild at around 18.9°C, kept fresh by a gentle marine breeze that invites lingering outdoor dinners and seaside walks.
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 August
- Breathable linen shirts, lightweight tees, and cotton shorts for warm afternoons.
- Swimwear, rash guards, and water sandals for beach days and ocean sports.
- A wide-brim sun hat and UV-blocking sunglasses for intense midday glare.
- High-SPF broad-spectrum sunscreen for long days in the sun.
- A light denim jacket, cardigan, or sweatshirt for cooler coastal evenings.
What to pack for San Diego in August
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Where to stay in San Diego
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Compare hotels on Booking.com→Estimated August trip to San Diego
Peak season prices — book early or shift by 2–3 weeks to save. Rule-based estimates from a couple based in London — actual prices vary.
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Things worth doing
Take advantage of peak ocean temperatures by swimming, surfing, or sea kayaking along the cove waters of La Jolla. Spend breezy late afternoons strolling through Balboa Park's open-air gardens before watching golden hour from the bluffs of Sunset Cliffs.
August 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
August is one of the best months to visit San Diego — alongside April, June, July. 11-year climate data (2015–2025) confirms it: comfortable temperatures, manageable rainfall, and a healthy dose of sunshine.
See the full best-time-to-visit guide for San DiegoOther places with a similar climate right now
San Diego in August — FAQ
Q01Should I visit San Diego in August?
Should I visit San Diego in August?
Yes — this is one of the best months of the year to visit. In August, San Diego averages a high of 26°C (78°F) and a low of 19°C (66°F), with 8mm of rainfall across roughly 1 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 August?
What temperatures should I expect in San Diego during August?
The average high temperature in San Diego during August is 26°C (78°F), with an average low of 19°C (66°F). These figures are averaged from 11 complete years of daily records (2015–2025, Open-Meteo Archive). August Santa Ana winds push inland temperatures past 35C; locals abandon the county fair and cluster at Pacific Beach or drive to Coronado's ferry-cooled sand.
Q03Is August a rainy month in San Diego?
Is August a rainy month in San Diego?
San Diego averages approximately 1 rainy days in August, with a total monthly rainfall of about 8mm. 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 August?
How should I dress for San Diego in August?
For San Diego in August, 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 August a busy travel month for San Diego?
Is August a busy travel month for San Diego?
Tourist crowds in San Diego during August are typically high — this is peak season, expect crowds and higher prices. 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.'