S
M
T
W
T
F
S
26
81°
48°
27
79°
55°
28
80°
71°
29
77°
66°
30
75°
63°
31
82°
65°
1
82°
68°
2
81°
68°
3
79°
71°
4
80°
69°
5
80°
71°
6
85°
70°
7
85°
68°
8
84°
69°
9
85°
70°
10
87°
67°
11
85°
68°
12
84°
65°
13
82°
64°
14
84°
66°
15
79°
62°
16
77°
61°
17
77°
67°
18
78°
64°
19
78°
62°
20
77°
62°
21
77°
67°
22
78°
67°
23
77°
63°
24
76°
61°
25
76°
62°
26
75°
61°
27
76°
60°
28
76°
60°
29
75°
59°
30
75°
61°
31
79°
66°
1
80°
67°
2
81°
66°
3
76°
63°
4
75°
60°
5
74°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Mattituck
Mattituck's August 2026 forecast shows daily high temperatures ranging from 74° to 87°, with overnight lows between 59° and 71°. The average high for August is 79° with an average low of 65°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Mattituck. See also: September | October | November.
