S
M
T
W
T
F
S
26
83°
63°
27
84°
63°
28
83°
62°
29
83°
62°
30
81°
61°
31
75°
58°
1
75°
56°
2
76°
56°
3
76°
59°
4
77°
59°
5
76°
58°
6
76°
60°
7
77°
61°
8
75°
61°
9
76°
59°
10
80°
54°
11
77°
54°
12
81°
58°
13
78°
59°
14
81°
60°
15
83°
59°
16
82°
60°
17
83°
60°
18
83°
59°
19
81°
55°
20
78°
52°
21
74°
52°
22
74°
50°
23
75°
50°
24
74°
52°
25
77°
52°
26
80°
53°
27
80°
50°
28
78°
55°
29
76°
55°
30
75°
54°
31
79°
57°
1
79°
49°
2
78°
48°
3
71°
49°
4
73°
51°
5
75°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Alton Bay
Alton Bay's August 2026 forecast shows daily high temperatures ranging from 71° to 84°, with overnight lows between 48° and 63°. The average high for August is 78° with an average low of 56°. 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 Alton Bay. See also: September | October | November.
