S
M
T
W
T
F
S
26
51°
41°
27
55°
45°
28
51°
43°
29
49°
43°
30
56°
46°
1
59°
46°
2
55°
47°
3
52°
42°
4
59°
41°
5
59°
51°
6
63°
54°
7
60°
47°
8
59°
41°
9
61°
44°
10
61°
51°
11
59°
44°
12
57°
43°
13
59°
50°
14
56°
50°
15
55°
45°
16
61°
45°
17
71°
56°
18
67°
57°
19
67°
57°
20
73°
60°
21
65°
50°
22
58°
47°
23
61°
51°
24
54°
52°
25
61°
52°
26
72°
58°
27
70°
53°
28
58°
50°
29
61°
49°
30
64°
48°
31
63°
53°
1
67°
55°
2
66°
56°
3
68°
56°
4
66°
57°
5
70°
53°
6
63°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Wellfleet by the Sea
Wellfleet by the Sea's May 2026 forecast shows daily high temperatures ranging from 54° to 72°, with overnight lows between 48° and 58°. The average high for May is 64° with an average low of 53°. 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 Wellfleet by the Sea. See also: June | July | August.
