The highest day temperature in August 2026 was 102°F. The lowest night temperature was 82°F. The average values for day and night temperatures during August were 99.2°F и 84.0°F respectivly.

The average sea surface temperature in August 2026 for San Diego was 88.8°F. The maximum and minimum values were 87.8°F and 89.8°F respectively.

Most of the days in August are gloomy but you can also expect sunny days.

Precipitation total in August for San Diego is 3.3 in. It makes august one of the most rainy months of the year.

The average wind speed in August is 9.4 mph.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for San Diego in August is 6.0 hours.