S
M
T
W
T
F
S
26
98°
77°
27
97°
76°
28
99°
77°
29
98°
77°
30
98°
76°
31
97°
77°
1
98°
77°
2
96°
76°
3
97°
75°
4
97°
75°
5
98°
74°
6
97°
73°
7
98°
74°
8
100°
75°
9
100°
74°
10
99°
75°
11
98°
74°
12
98°
73°
13
95°
74°
14
95°
75°
15
96°
76°
16
97°
76°
17
98°
77°
18
98°
76°
19
97°
75°
20
97°
74°
21
96°
74°
22
96°
75°
23
97°
73°
24
96°
72°
25
97°
73°
26
96°
74°
27
97°
75°
28
95°
73°
29
95°
73°
30
94°
74°
31
94°
73°
1
93°
74°
2
95°
73°
3
94°
72°
4
93°
72°
5
95°
73°
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 93° to 100°, with overnight lows between 72° and 77°. The average high for August is 97° with an average low of 75°. 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.
