S
M
T
W
T
F
S
26
81°
68°
27
79°
66°
28
79°
67°
29
82°
68°
30
79°
67°
31
79°
70°
1
80°
66°
2
78°
65°
3
79°
64°
4
79°
65°
5
78°
68°
6
79°
69°
7
79°
70°
8
80°
70°
9
79°
67°
10
79°
70°
11
80°
69°
12
80°
66°
13
79°
67°
14
81°
70°
15
84°
67°
16
78°
64°
17
78°
66°
18
79°
63°
19
77°
68°
20
77°
65°
21
78°
64°
22
74°
63°
23
75°
63°
24
76°
67°
25
76°
68°
26
77°
67°
27
77°
68°
28
75°
65°
29
78°
66°
30
83°
65°
31
84°
68°
1
82°
65°
2
81°
67°
3
81°
68°
4
80°
66°
5
81°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in South Setauket
South Setauket's August 2026 forecast shows daily high temperatures ranging from 74° to 84°, with overnight lows between 63° and 70°. The average high for August is 79° with an average low of 67°. 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 South Setauket. See also: September | October | November.
