S
M
T
W
T
F
S
26
74°
63°
27
76°
65°
28
72°
64°
29
72°
66°
30
75°
64°
31
74°
66°
1
72°
66°
2
73°
66°
3
72°
65°
4
72°
62°
5
72°
61°
6
73°
63°
7
79°
63°
8
84°
68°
9
83°
68°
10
83°
68°
11
79°
69°
12
81°
68°
13
79°
65°
14
81°
64°
15
80°
65°
16
83°
63°
17
82°
65°
18
81°
63°
19
80°
63°
20
80°
64°
21
83°
61°
22
84°
64°
23
85°
64°
24
80°
61°
25
82°
63°
26
84°
64°
27
85°
64°
28
85°
63°
29
84°
64°
30
85°
63°
31
84°
62°
1
84°
62°
2
83°
60°
3
82°
60°
4
82°
61°
5
84°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in San Juan Capistrano
San Juan Capistrano's August 2026 forecast shows daily high temperatures ranging from 79° to 85°, with overnight lows between 60° and 69°. The average high for August is 82° with an average low of 64°. 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 Juan Capistrano. See also: September | October | November.
