S
M
T
W
T
F
S
26
74°
61°
27
65°
56°
28
66°
57°
29
67°
58°
30
69°
58°
31
69°
57°
1
71°
59°
2
68°
58°
3
68°
59°
4
70°
58°
5
70°
58°
6
71°
59°
7
71°
58°
8
70°
59°
9
69°
57°
10
69°
58°
11
70°
59°
12
71°
59°
13
71°
58°
14
70°
60°
15
72°
60°
16
72°
59°
17
71°
59°
18
70°
58°
19
70°
58°
20
71°
59°
21
70°
59°
22
70°
57°
23
69°
58°
24
65°
57°
25
65°
53°
26
66°
56°
27
65°
53°
28
66°
53°
29
65°
57°
30
64°
57°
31
66°
52°
1
66°
51°
2
64°
56°
3
64°
51°
4
69°
50°
5
64°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Selsey
Selsey's August 2026 forecast shows daily high temperatures ranging from 64° to 74°, with overnight lows between 50° and 61°. The average high for August is 68° with an average low of 57°. 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 Selsey. See also: September | October | November.