Weather in San Diego: August
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Average day temperature: | 78.9°F |
| Average night temperature: | 68.2°F | |
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Sea water temperature: | 69.9°F |
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Number of sunny days: | 20 days |
| Day length: | 12.9 - 13.7 hours | |
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Number of rainy days: | 1 day |
| Precipitation totals: | 0.3 in. | |
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forecast
| San Diego |
temperature
| San Diego |
Air temperature in August, °F
The highest day temperature during August of 2025 was 85°F. At the same time the lowest night temperature was 63°F. Daily and nightly averages during August were 77.1°F and 67.0°F.
Sea water temperature in San Diego in August, °F
The average sea water temperature in August of 2025 was 68.9°F. The highest and lowest sea temperatures during the month were 72.3°F and 63.3°F.
Mostly all days in August are sunny but cloudy days are also possible.
Precipitation total in August, in.
Precipitation total value in San Diego in August is 0.4 in. Other months of the year show relatively similar values.
The average wind speed value in August is 6.3 mph
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in August is: 9.4.
Best time for vacation in San Diego
San Diego on a weather map
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