S
M
T
W
T
F
S
26
72°
55°
27
73°
58°
28
73°
61°
29
74°
62°
30
76°
64°
31
78°
64°
1
81°
63°
2
81°
65°
3
80°
64°
4
80°
57°
5
74°
56°
6
72°
55°
7
72°
54°
8
73°
56°
9
73°
56°
10
74°
60°
11
77°
62°
12
76°
63°
13
79°
64°
14
78°
63°
15
81°
56°
16
80°
55°
17
73°
55°
18
72°
54°
19
73°
56°
20
75°
59°
21
74°
56°
22
72°
56°
23
75°
58°
24
77°
62°
25
76°
54°
26
74°
56°
27
73°
57°
28
74°
63°
29
78°
62°
30
79°
63°
31
79°
59°
1
78°
61°
2
75°
57°
3
76°
55°
4
70°
59°
5
77°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Harbor Beach
Harbor Beach's August 2026 forecast shows daily high temperatures ranging from 70° to 81°, with overnight lows between 54° and 65°. The average high for August is 76° with an average low of 59°. 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 Harbor Beach. See also: September | October | November.