This post is a summary of the August weather in San Francisco, with tips on how to dress, what to pack and things to do. While many cities in the U.S. are experiencing hot and sometimes humid conditions, San Francisco suffers none of these. Far from ideal beach weather, San Francisco is very pleasant, even a bit chilly during the month of August. It’s great for outdoor activities, such as a pay-what-you-like walking tour or visiting Alcatraz.
Skies are sunny and the weather is comfortable with afternoon temperatures tending to average around 70F (21C). A few of the warmer afternoons could reach into the upper 70s F to low 80s F (26C-27C) while a few of the cooler afternoons will only in the mid-60s F (18C-20C).
Late night and early morning low temperatures tend to average in the mid to upper 50s F (13C-15C) with a couple of the cooler mornings dipping down in the mid to lower 50s F (12-13C). The all-time record low temperature in San Francisco during August is 48F (8.9C) while the hottest temperature was 98F (36.7C)
Most of the time you will encounter either clear or partly sunny skies this month as only about 2-3 days will be cloudy. August is a dry month with only 1 day this month likely to record any rainfall at all. San Francisco can be a bit breezy with the average wind speed mostly between 10-15 mph.
August is a bit of a tricky month. Because on the days when it is sunny and the wind isn’t blowing, it can easily get into the mid 80s F (30 C). But if the fog is covering the city and the wind starts blowing, the temperature can quickly get down to 60 F (16 C) and very chilly!
The average wind speed in August is about 10 mph (17 kph). And it can frequently be even more windy than that!
The best idea for this month is to wear layers. Leave your hotel wearing at least a t-shirt and perhaps a light sweatshirt, as well as long pants. It is also a good idea to bring a light jacket to carry around with you, as well as earmuffs or a scarf if the wind bothers you. Make sure it’s light enough to carry around, because we do a lot of walking in the city!
Do I Need an Umbrella in San Francisco in August?
In a word, no. San Francisco averages 0.06 inches (1.5 mm) of rain all month in August. Bringing an umbrella will almost certainly be unnecessary. Obviously, you should double check the weather report before arriving, but you can be almost certain that it will not rain during the month.
Other August Activities: Get Outside!
Even though it can be foggy, there will be plenty of opportunities to get outside and enjoy our beautiful city. From August 11-13, there is the Outside Lands Music & Arts Festival in Golden Gate Park. From August 24-27, there’s Eat Drink SF in nearby Fort Mason that will feature a number of local chefs, local wine, beer and food.
And for those who want a little more physical activity on their vacation, why not sign up for the Giant Race at AT&T Park on August 27th? The Giant Race includes a half marathon, a 10K distance, and a 5K distance. All the routes lead through the City of San Francisco streets and finish on the field at AT&T Park – home of the San Francisco Giants. You’ll get a different kind of tour throughout the city, and finish in the most beautiful baseball park in the United States.
And of course, you must also check out a couple of the Free Tours by Foot San Francisco walking tours to really experience what this city has to offer. Be sure to check out our new All-In-One Day tour!