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
61°
37°
13
62°
49°
14
65°
50°
15
67°
44°
16
70°
39°
17
80°
53°
18
71°
60°
19
77°
61°
20
82°
54°
21
65°
48°
22
61°
50°
23
65°
56°
24
63°
54°
25
68°
56°
26
67°
54°
27
71°
54°
28
71°
53°
29
72°
56°
30
71°
53°
31
68°
57°
1
70°
55°
2
67°
54°
3
66°
54°
4
67°
58°
5
70°
58°
6
72°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mattituck
Mattituck's May 2026 forecast shows daily high temperatures ranging from 61° to 82°, with overnight lows between 48° and 61°. The average high for May is 70° 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 Mattituck. See also: June | July | August.
