S
M
T
W
T
F
S
26
85°
64°
27
65°
57°
28
81°
56°
29
84°
61°
30
80°
67°
1
71°
62°
2
65°
54°
3
74°
46°
4
79°
50°
5
80°
55°
6
85°
60°
7
86°
67°
8
77°
61°
9
82°
62°
10
86°
67°
11
92°
69°
12
73°
62°
13
79°
61°
14
87°
59°
15
83°
54°
16
85°
58°
17
89°
68°
18
89°
66°
19
88°
65°
20
88°
65°
21
90°
67°
22
90°
75°
23
90°
74°
24
92°
72°
25
90°
77°
26
92°
78°
27
95°
74°
28
90°
72°
29
84°
72°
30
83°
70°
31
78°
68°
1
80°
65°
2
84°
66°
3
84°
66°
4
82°
67°
5
82°
69°
6
84°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Seabrook
Seabrook's May 2026 forecast shows daily high temperatures ranging from 78° to 95°, with overnight lows between 65° and 74°. The average high for May is 84° with an average low of 69°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Seabrook. See also: June | July | August.