S
M
T
W
T
F
S
26
79°
62°
27
82°
63°
28
84°
63°
29
84°
62°
30
83°
63°
31
80°
63°
1
79°
62°
2
81°
63°
3
80°
63°
4
79°
62°
5
80°
62°
6
78°
61°
7
78°
62°
8
83°
57°
9
76°
56°
10
76°
55°
11
77°
62°
12
77°
59°
13
76°
61°
14
77°
62°
15
79°
62°
16
79°
60°
17
79°
55°
18
77°
53°
19
77°
58°
20
78°
60°
21
76°
57°
22
78°
54°
23
81°
54°
24
76°
53°
25
75°
51°
26
75°
53°
27
76°
53°
28
73°
52°
29
75°
54°
30
77°
58°
31
80°
58°
1
81°
59°
2
81°
58°
3
80°
51°
4
79°
49°
5
72°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Seabrook
Seabrook's August 2026 forecast shows daily high temperatures ranging from 72° to 84°, with overnight lows between 49° and 63°. The average high for August is 78° with an average low of 58°. 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 Seabrook. See also: September | October | November.