S
M
T
W
T
F
S
26
59°
36°
27
71°
42°
28
63°
48°
29
49°
37°
30
47°
33°
1
42°
30°
2
44°
36°
3
57°
36°
4
69°
46°
5
57°
44°
6
48°
38°
7
47°
32°
8
59°
36°
9
62°
42°
10
52°
41°
11
45°
32°
12
56°
29°
13
56°
40°
14
51°
36°
15
65°
33°
16
71°
51°
17
79°
63°
18
87°
66°
19
84°
43°
20
50°
35°
21
57°
43°
22
60°
43°
23
64°
49°
24
68°
52°
25
70°
51°
26
68°
49°
27
68°
50°
28
71°
51°
29
70°
52°
30
73°
46°
31
70°
51°
1
67°
51°
2
68°
52°
3
68°
52°
4
63°
49°
5
63°
49°
6
68°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Seaforth
Seaforth's May 2026 forecast shows daily high temperatures ranging from 50° to 87°, with overnight lows between 35° and 66°. The average high for May 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 May weather will actually feel in Seaforth. See also: June | July | August.