S
M
T
W
T
F
S
30
95°
76°
31
90°
79°
1
86°
80°
2
93°
81°
3
91°
81°
4
91°
79°
5
90°
79°
6
90°
79°
7
N/A
8
92°
80°
9
89°
78°
10
90°
78°
11
92°
78°
12
93°
74°
13
93°
75°
14
92°
74°
15
88°
73°
16
89°
73°
17
90°
74°
18
88°
71°
19
89°
69°
20
87°
69°
21
88°
68°
22
89°
72°
23
88°
71°
24
88°
72°
25
87°
71°
26
87°
71°
27
88°
70°
28
88°
71°
29
87°
71°
30
84°
68°
1
82°
62°
2
78°
61°
3
79°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Seabrook
Seabrook's September 2026 forecast shows daily high temperatures ranging from 78° to 93°, with overnight lows between 61° and 80°. The average high for September is 88° with an average low of 71°. 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.
