S
M
T
W
T
F
S
26
80°
71°
27
77°
70°
28
82°
64°
29
82°
59°
30
83°
57°
31
82°
61°
1
73°
66°
2
85°
65°
3
78°
59°
4
83°
59°
5
77°
67°
6
80°
64°
7
83°
66°
8
78°
63°
9
76°
61°
10
81°
66°
11
82°
64°
12
81°
67°
13
78°
65°
14
86°
66°
15
78°
69°
16
79°
61°
17
77°
64°
18
77°
66°
19
73°
57°
20
72°
57°
21
75°
56°
22
76°
60°
23
79°
63°
24
80°
61°
25
79°
62°
26
79°
61°
27
78°
57°
28
77°
56°
29
76°
61°
30
78°
62°
31
72°
56°
1
71°
60°
2
71°
61°
3
72°
59°
4
71°
57°
5
72°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Grand Haven
Grand Haven's August 2026 forecast shows daily high temperatures ranging from 71° to 80°, with overnight lows between 55° and 69°. The average high for August is 76° with an average low of 60°. 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 Grand Haven. See also: September | October | November.
