S
M
T
W
T
F
S
26
74°
51°
27
66°
47°
28
67°
51°
29
66°
49°
30
66°
47°
31
67°
50°
1
65°
48°
2
68°
50°
3
71°
53°
4
68°
50°
5
66°
51°
6
67°
47°
7
73°
52°
8
73°
54°
9
66°
50°
10
64°
47°
11
62°
46°
12
65°
47°
13
64°
52°
14
64°
50°
15
65°
47°
16
70°
50°
17
64°
48°
18
65°
45°
19
65°
47°
20
67°
49°
21
72°
50°
22
71°
43°
23
65°
43°
24
66°
44°
25
71°
49°
26
71°
48°
27
62°
43°
28
70°
46°
29
70°
51°
30
66°
48°
31
61°
49°
1
68°
49°
2
68°
48°
3
69°
40°
4
60°
40°
5
58°
40°
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 58° to 74°, with overnight lows between 40° and 54°. The average high for August is 67° with an average low of 48°. 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.
