S
M
T
W
T
F
S
26
68°
55°
27
67°
51°
28
69°
53°
29
71°
51°
30
69°
50°
31
67°
53°
1
67°
52°
2
68°
50°
3
68°
50°
4
69°
52°
5
71°
55°
6
69°
51°
7
68°
53°
8
69°
55°
9
72°
56°
10
73°
57°
11
74°
53°
12
71°
52°
13
69°
51°
14
70°
52°
15
70°
52°
16
69°
53°
17
Hist. Avg.
71°
50°
18
Hist. Avg.
71°
50°
19
Hist. Avg.
71°
50°
20
Hist. Avg.
71°
50°
21
Hist. Avg.
71°
50°
22
Hist. Avg.
71°
51°
23
Hist. Avg.
72°
51°
24
Hist. Avg.
72°
51°
25
Hist. Avg.
72°
51°
26
Hist. Avg.
72°
51°
27
Hist. Avg.
72°
51°
28
Hist. Avg.
72°
52°
29
Hist. Avg.
73°
52°
30
Hist. Avg.
73°
52°
31
Hist. Avg.
73°
52°
1
Hist. Avg.
73°
52°
2
Hist. Avg.
73°
52°
3
Hist. Avg.
73°
53°
4
Hist. Avg.
74°
53°
5
Hist. Avg.
74°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Long Island
Long Island's August 2026 forecast shows daily high temperatures ranging from 67° to 74°, with overnight lows between 50° and 57°. The average high for August is 69° with an average low of 53°. 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 Long Island. See also: September | October | November.
