S
M
T
W
T
F
S
26
80°
66°
27
79°
65°
28
80°
66°
29
80°
65°
30
79°
64°
31
79°
62°
1
77°
59°
2
74°
59°
3
73°
60°
4
74°
62°
5
75°
65°
6
78°
65°
7
80°
66°
8
80°
66°
9
81°
65°
10
81°
66°
11
80°
66°
12
79°
63°
13
80°
64°
14
79°
63°
15
78°
65°
16
79°
65°
17
81°
64°
18
80°
65°
19
82°
64°
20
81°
61°
21
78°
60°
22
76°
60°
23
76°
63°
24
77°
64°
25
80°
63°
26
76°
59°
27
75°
58°
28
75°
58°
29
76°
57°
30
74°
59°
31
77°
60°
1
78°
59°
2
78°
59°
3
77°
60°
4
77°
60°
5
81°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Oceanside
Oceanside's August 2026 forecast shows daily high temperatures ranging from 73° to 82°, with overnight lows between 57° and 66°. The average high for August is 78° with an average low of 62°. 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 Oceanside. See also: September | October | November.
