S
M
T
W
T
F
S
28
78°
63°
29
84°
57°
30
82°
58°
1
82°
68°
2
90°
72°
3
98°
68°
4
97°
70°
5
82°
67°
6
68°
64°
7
72°
64°
8
80°
62°
9
80°
68°
10
87°
67°
11
81°
59°
12
83°
58°
13
80°
54°
14
82°
71°
15
92°
68°
16
84°
63°
17
85°
59°
18
78°
59°
19
79°
52°
20
78°
52°
21
76°
57°
22
82°
71°
23
78°
55°
24
80°
58°
25
80°
58°
26
80°
61°
27
81°
66°
28
82°
69°
29
82°
66°
30
80°
65°
31
83°
66°
1
82°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Mattituck
Mattituck's July 2026 forecast shows daily high temperatures ranging from 78° to 83°, with overnight lows between 55° and 69°. The average high for July is 81° with an average low of 63°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Mattituck. See also: August | September | October.
