S
M
T
W
T
F
S
26
88°
72°
27
89°
73°
28
87°
72°
29
87°
73°
30
88°
73°
31
90°
72°
1
92°
73°
2
91°
72°
3
92°
70°
4
88°
72°
5
90°
71°
6
87°
72°
7
91°
68°
8
88°
67°
9
87°
68°
10
91°
67°
11
91°
67°
12
90°
71°
13
92°
72°
14
92°
71°
15
91°
70°
16
88°
71°
17
87°
71°
18
86°
70°
19
91°
67°
20
85°
66°
21
86°
66°
22
86°
69°
23
87°
66°
24
86°
65°
25
86°
65°
26
88°
70°
27
90°
71°
28
91°
70°
29
90°
71°
30
90°
70°
31
89°
66°
1
88°
65°
2
83°
63°
3
84°
64°
4
86°
67°
5
87°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Brookhaven
Brookhaven's August 2026 forecast shows daily high temperatures ranging from 83° to 92°, with overnight lows between 63° and 73°. The average high for August is 88° with an average low of 69°. 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 Brookhaven. See also: September | October | November.