Weather

San Diego Weather in August

San Diego weather in August is a summer dream with sunny days, mild evenings, and warm coastal waters. With average highs of 69°F, lows of 59°F, and just 0.12 inches of rainfall, August is the perfect month to enjoy beach outings, outdoor festivals, and cultural events across the city.

by Mac Douglass

Updated March 01, 2025

What Is the Weather Like in San Diego in August?

August in San Diego delivers consistent summer warmth, with average highs of 69°F (21°C) and lows of 59°F (15°C). Rainfall remains minimal, averaging just 0.12 inches spread across two days. The city receives about 261 hours of sunshine, offering plenty of daylight for outdoor activities.

Ocean temperatures are at their peak for the year, drawing swimmers, surfers, and kayakers to San Diego’s scenic beaches.

Average August Weather in San Diego

Daytime Temperatures: Highs average 69°F, staying steady throughout the month.
Nighttime Temperatures: Lows average 59°F, providing comfortably cool evenings.
Rainfall: August sees light rainfall, with just 0.12 inches recorded over two days.
Ocean Temperatures: Waters are warm enough for all types of water activities, from swimming to paddleboarding.

August San Diego Weather Compared to Other Months

Month	Average High (°F)	Average Low (°F)	Days with Precipitation	Hours of Sunshine	Average Precipitation (in)
January	65	48	6	217	1.53
February	76	65	1	255	0.15
March	73	61	3	234	0.57
April	69	54	4	236	1.01
May	76	67	0	277	0.02
June	75	65	0	293	0.03
July	71	62	1	253	0.07
August	69	59	2	261	0.12
September	67	56	5	242	0.78
October	66	53	7	262	1.81
November	65	51	7	212	2.27
December	65	49	7	216	1.98

San Diego’s weather in August is similar to July, with warm, dry conditions and plenty of sunshine.

Compared to September, which averages highs of 67°F and lows of 56°F, August offers slightly warmer evenings, making it a favorite month for summer visitors.

Things to Do in San Diego in August

San Diego’s August weather sets the stage for an exciting lineup of summer activities, festivals, and events.

Del Mar Racing Season (Now - September 8): Experience thrilling horse races where "the turf meets the surf" at Del Mar Racetrack.
Tiki Oasis (July 31 - August 4): Immerse yourself in Polynesian culture at the world’s largest Tiki event.
Hillcrest CityFest Street Fair (August 11): Celebrate art, music, and food at this vibrant festival in Hillcrest.
Chula Vista Lemon Festival (August 17): Enjoy lemon-themed food, drinks, and activities in downtown Chula Vista.
Bike the Bay (August 25): Take part in this scenic bike ride across the Coronado Bay Bridge, offering breathtaking views of the bay.

Why Visit San Diego in August?

San Diego’s August weather offers warm days, cool evenings, and minimal rain, creating an inviting atmosphere for summer adventures. Highlights include:

Perfect beach weather with peak ocean temperatures.
Iconic summer events like the Del Mar Racing Season and World Bodysurfing Championships.
Long daylight hours for extended outdoor activities.

Plan Your Trip Around the August Weather in San Diego, California

August in San Diego combines warm temperatures, clear skies, and vibrant cultural events, making it one of the most enjoyable months to visit. Whether you’re lounging on the beach, attending world-class festivals, or exploring the city’s scenic neighborhoods, San Diego in August promises unforgettable experiences.