S
M
T
W
T
F
S
26
71°
67°
27
73°
68°
28
76°
69°
29
76°
69°
30
77°
68°
31
76°
68°
1
75°
69°
2
75°
68°
3
76°
68°
4
76°
69°
5
75°
69°
6
74°
67°
7
72°
67°
8
71°
68°
9
74°
67°
10
75°
66°
11
76°
67°
12
75°
65°
13
76°
63°
14
74°
63°
15
72°
67°
16
74°
68°
17
76°
68°
18
77°
67°
19
77°
68°
20
76°
67°
21
77°
65°
22
75°
66°
23
73°
66°
24
72°
65°
25
73°
67°
26
74°
68°
27
75°
67°
28
76°
67°
29
76°
66°
30
74°
67°
31
76°
68°
1
75°
69°
2
77°
69°
3
76°
68°
4
76°
69°
5
75°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Mission Bay
Mission Bay's August 2026 forecast shows daily high temperatures ranging from 71° to 77°, with overnight lows between 63° and 69°. The average high for August is 75° with an average low of 67°. 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 Mission Bay. See also: September | October | November.