S
M
T
W
T
F
S
30
83°
58°
31
75°
57°
1
68°
60°
2
70°
62°
3
73°
63°
4
83°
64°
5
72°
60°
6
76°
55°
7
83°
53°
8
78°
57°
9
71°
55°
10
87°
67°
11
76°
47°
12
71°
60°
13
70°
62°
14
76°
49°
15
66°
52°
16
73°
58°
17
73°
57°
18
74°
51°
19
70°
50°
20
66°
47°
21
68°
47°
22
68°
48°
23
67°
48°
24
71°
47°
25
63°
43°
26
64°
46°
27
62°
50°
28
66°
50°
29
62°
47°
30
62°
48°
1
63°
50°
2
64°
48°
3
67°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Seabrook
Seabrook's September 2026 forecast shows daily high temperatures ranging from 62° to 76°, with overnight lows between 43° and 62°. The average high for September is 68° with an average low of 50°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Seabrook. See also: October | November | December.
