S
M
T
W
T
F
S
26
55°
43°
27
56°
44°
28
55°
45°
29
56°
46°
30
59°
47°
1
60°
46°
2
58°
47°
3
59°
45°
4
60°
47°
5
59°
47°
6
57°
46°
7
57°
44°
8
60°
43°
9
57°
44°
10
58°
50°
11
59°
45°
12
57°
43°
13
59°
50°
14
65°
51°
15
61°
50°
16
61°
50°
17
62°
51°
18
64°
54°
19
69°
50°
20
67°
46°
21
60°
46°
22
62°
50°
23
63°
50°
24
66°
54°
25
70°
55°
26
71°
53°
27
63°
53°
28
64°
56°
29
65°
54°
30
66°
53°
31
65°
56°
1
72°
55°
2
71°
57°
3
72°
57°
4
73°
58°
5
74°
56°
6
73°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Shelter Island
Shelter Island's May 2026 forecast shows daily high temperatures ranging from 55° to 74°, with overnight lows between 43° and 58°. The average high for May is 63° 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 Shelter Island. See also: June | July | August.
