S
M
T
W
T
F
S
26
81°
71°
27
79°
69°
28
78°
69°
29
78°
68°
30
78°
68°
31
79°
67°
1
82°
68°
2
81°
69°
3
79°
68°
4
79°
69°
5
79°
70°
6
80°
69°
7
81°
70°
8
79°
68°
9
78°
70°
10
79°
68°
11
78°
69°
12
78°
71°
13
77°
67°
14
76°
68°
15
76°
70°
16
77°
69°
17
75°
67°
18
75°
68°
19
78°
70°
20
79°
69°
21
78°
70°
22
80°
70°
23
80°
71°
24
81°
71°
25
81°
70°
26
80°
71°
27
80°
71°
28
81°
70°
29
79°
70°
30
80°
71°
31
81°
71°
1
80°
70°
2
81°
70°
3
78°
69°
4
77°
70°
5
77°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in San Diego
San Diego's August 2026 forecast shows daily high temperatures ranging from 75° to 82°, with overnight lows between 67° and 71°. The average high for August is 79° with an average low of 69°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in San Diego. See also: September | October | November.
