S
M
T
W
T
F
S
26
85°
69°
27
83°
70°
28
86°
71°
29
86°
70°
30
84°
71°
31
85°
71°
1
84°
70°
2
83°
71°
3
85°
70°
4
84°
69°
5
85°
69°
6
82°
68°
7
84°
70°
8
85°
66°
9
78°
63°
10
78°
63°
11
79°
68°
12
79°
69°
13
80°
69°
14
79°
70°
15
80°
69°
16
82°
69°
17
81°
63°
18
78°
61°
19
79°
67°
20
80°
66°
21
79°
67°
22
83°
66°
23
82°
65°
24
82°
62°
25
76°
61°
26
77°
61°
27
75°
62°
28
75°
60°
29
76°
60°
30
77°
64°
31
80°
66°
1
82°
66°
2
82°
65°
3
81°
59°
4
81°
58°
5
74°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in East Islip
East Islip's August 2026 forecast shows daily high temperatures ranging from 74° to 86°, with overnight lows between 58° and 71°. The average high for August is 81° with an average low of 66°. 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 East Islip. See also: September | October | November.
