S
M
T
W
T
F
S
26
64°
51°
27
63°
50°
28
64°
51°
29
64°
47°
30
63°
46°
1
65°
52°
2
66°
47°
3
65°
48°
4
66°
53°
5
73°
57°
6
75°
56°
7
68°
56°
8
75°
58°
9
77°
59°
10
77°
58°
11
72°
54°
12
66°
53°
13
68°
55°
14
68°
54°
15
68°
58°
16
68°
56°
17
70°
56°
18
79°
53°
19
72°
54°
20
75°
54°
21
72°
52°
22
72°
52°
23
71°
54°
24
72°
54°
25
71°
56°
26
73°
56°
27
73°
57°
28
75°
56°
29
74°
64°
30
76°
58°
31
83°
57°
1
75°
64°
2
78°
61°
3
81°
59°
4
78°
62°
5
81°
59°
6
78°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Dewey Beach
Dewey Beach's May 2026 forecast shows daily high temperatures ranging from 63° to 83°, with overnight lows between 46° and 64°. The average high for May is 72° 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 Dewey Beach. See also: June | July | August.
