S
M
T
W
T
F
S
26
55°
32°
27
64°
31°
28
63°
31°
29
55°
32°
30
54°
38°
1
60°
32°
2
54°
42°
3
58°
31°
4
61°
30°
5
62°
52°
6
62°
54°
7
63°
35°
8
61°
32°
9
62°
44°
10
66°
43°
11
59°
35°
12
63°
48°
13
61°
53°
14
58°
51°
15
57°
51°
16
69°
56°
17
76°
53°
18
68°
56°
19
71°
60°
20
74°
52°
21
66°
55°
22
67°
54°
23
68°
55°
24
67°
54°
25
69°
51°
26
71°
56°
27
72°
56°
28
72°
57°
29
73°
58°
30
73°
58°
31
72°
57°
1
71°
57°
2
66°
55°
3
66°
54°
4
68°
58°
5
69°
59°
6
73°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Southold
Southold's May 2026 forecast shows daily high temperatures ranging from 57° to 76°, with overnight lows between 48° and 60°. The average high for May is 68° 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 Southold. See also: June | July | August.
