S
M
T
W
T
F
S
26
77°
61°
27
78°
62°
28
78°
61°
29
80°
62°
30
78°
63°
31
82°
63°
1
81°
62°
2
81°
62°
3
77°
61°
4
77°
61°
5
78°
62°
6
77°
62°
7
79°
61°
8
78°
62°
9
77°
62°
10
79°
61°
11
79°
62°
12
80°
62°
13
80°
61°
14
83°
62°
15
83°
60°
16
82°
60°
17
79°
61°
18
83°
62°
19
82°
61°
20
79°
58°
21
82°
55°
22
76°
54°
23
77°
54°
24
78°
55°
25
76°
52°
26
77°
53°
27
74°
53°
28
72°
52°
29
72°
51°
30
73°
51°
31
72°
50°
1
71°
51°
2
71°
51°
3
72°
52°
4
72°
53°
5
71°
52°
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 83°, with overnight lows between 50° and 63°. The average high for August is 77° with an average low of 58°. 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.
