S
M
T
W
T
F
S
26
84°
73°
27
86°
77°
28
86°
75°
29
84°
73°
30
90°
68°
1
68°
57°
2
75°
55°
3
77°
57°
4
79°
61°
5
82°
70°
6
84°
75°
7
79°
64°
8
75°
68°
9
90°
75°
10
86°
73°
11
81°
70°
12
81°
64°
13
90°
68°
14
88°
70°
15
86°
70°
16
86°
72°
17
84°
79°
18
84°
79°
19
84°
65°
20
79°
67°
21
81°
72°
22
90°
70°
23
78°
73°
24
81°
72°
25
84°
72°
26
86°
73°
27
80°
72°
28
84°
71°
29
88°
74°
30
89°
73°
31
85°
70°
1
85°
69°
2
86°
69°
3
84°
70°
4
86°
72°
5
88°
72°
6
86°
74°
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 89°, with overnight lows between 69° and 74°. The average high for May is 85° with an average low of 72°. 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.