S
M
T
W
T
F
S
26
85°
68°
27
86°
68°
28
86°
67°
29
85°
67°
30
84°
66°
31
81°
66°
1
79°
67°
2
86°
68°
3
86°
68°
4
85°
67°
5
84°
66°
6
83°
67°
7
85°
64°
8
84°
58°
9
80°
55°
10
76°
62°
11
79°
57°
12
76°
55°
13
76°
56°
14
77°
62°
15
77°
62°
16
76°
56°
17
76°
56°
18
78°
57°
19
80°
61°
20
82°
60°
21
82°
61°
22
81°
63°
23
81°
60°
24
82°
64°
25
79°
64°
26
82°
59°
27
81°
54°
28
73°
54°
29
73°
53°
30
74°
52°
31
73°
53°
1
72°
54°
2
72°
52°
3
73°
53°
4
79°
57°
5
73°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Tonka Bay
Tonka Bay's August 2026 forecast shows daily high temperatures ranging from 72° to 86°, with overnight lows between 52° and 68°. The average high for August is 80° 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 Tonka Bay. See also: September | October | November.