S
M
T
W
T
F
S
26
88°
81°
27
89°
81°
28
90°
82°
29
90°
81°
30
89°
82°
31
89°
82°
1
91°
81°
2
87°
82°
3
90°
82°
4
89°
81°
5
89°
81°
6
87°
82°
7
88°
82°
8
88°
81°
9
89°
82°
10
88°
82°
11
89°
81°
12
90°
82°
13
89°
81°
14
90°
80°
15
90°
80°
16
89°
79°
17
90°
78°
18
89°
78°
19
88°
77°
20
89°
78°
21
89°
79°
22
90°
78°
23
91°
79°
24
90°
80°
25
89°
78°
26
90°
80°
27
90°
79°
28
89°
80°
29
89°
80°
30
88°
78°
31
88°
80°
1
90°
78°
2
87°
78°
3
89°
79°
4
89°
78°
5
90°
79°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Long Key
Long Key's August 2026 forecast shows daily high temperatures ranging from 87° to 91°, with overnight lows between 77° and 82°. The average high for August is 89° with an average low of 80°. 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 Key. See also: September | October | November.
