S
M
T
W
T
F
S
26
76°
60°
27
75°
61°
28
75°
60°
29
74°
58°
30
71°
60°
31
73°
60°
1
74°
61°
2
74°
60°
3
72°
60°
4
72°
59°
5
70°
59°
6
74°
60°
7
74°
60°
8
72°
59°
9
74°
60°
10
75°
60°
11
74°
61°
12
75°
61°
13
75°
59°
14
71°
58°
15
71°
59°
16
69°
59°
17
72°
58°
18
71°
59°
19
70°
57°
20
72°
56°
21
72°
58°
22
73°
57°
23
73°
55°
24
72°
59°
25
73°
56°
26
69°
57°
27
68°
52°
28
67°
54°
29
68°
56°
30
67°
53°
31
67°
55°
1
68°
55°
2
67°
53°
3
67°
52°
4
66°
53°
5
66°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Blackheath
Blackheath's August 2026 forecast shows daily high temperatures ranging from 66° to 76°, with overnight lows between 52° and 61°. The average high for August is 71° with an average low of 58°. 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 Blackheath. See also: September | October | November.