S
M
T
W
T
F
S
26
49°
41°
27
66°
36°
28
64°
36°
29
68°
51°
30
70°
50°
1
68°
45°
2
61°
45°
3
60°
43°
4
76°
44°
5
84°
60°
6
74°
62°
7
66°
47°
8
69°
52°
9
72°
50°
10
83°
53°
11
58°
41°
12
65°
44°
13
62°
51°
14
63°
49°
15
63°
50°
16
71°
52°
17
78°
56°
18
78°
56°
19
79°
57°
20
81°
60°
21
79°
54°
22
67°
51°
23
69°
52°
24
70°
51°
25
71°
55°
26
74°
58°
27
72°
56°
28
74°
56°
29
74°
53°
30
76°
60°
31
80°
61°
1
75°
61°
2
79°
60°
3
78°
62°
4
81°
63°
5
81°
62°
6
80°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Seaford
Seaford's May 2026 forecast shows daily high temperatures ranging from 58° to 83°, with overnight lows between 41° and 63°. The average high for May is 73° with an average low of 55°. 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 Seaford. See also: June | July | August.