S
M
T
W
T
F
S
26
72°
54°
27
80°
57°
28
77°
60°
29
77°
61°
30
76°
60°
31
79°
59°
1
77°
57°
2
76°
58°
3
78°
60°
4
77°
59°
5
77°
62°
6
78°
61°
7
77°
62°
8
75°
62°
9
77°
61°
10
76°
62°
11
76°
60°
12
77°
60°
13
76°
61°
14
76°
62°
15
77°
62°
16
78°
61°
17
75°
62°
18
76°
61°
19
75°
62°
20
76°
61°
21
78°
60°
22
74°
57°
23
74°
60°
24
75°
60°
25
78°
61°
26
80°
60°
27
74°
59°
28
73°
57°
29
72°
56°
30
73°
59°
31
76°
59°
1
79°
58°
2
79°
59°
3
74°
55°
4
73°
54°
5
71°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Bar Harbor
Bar Harbor's August 2026 forecast shows daily high temperatures ranging from 71° to 80°, with overnight lows between 49° and 62°. 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 Bar Harbor. See also: September | October | November.
