S
M
T
W
T
F
S
26
80°
62°
27
81°
63°
28
82°
63°
29
77°
62°
30
77°
63°
31
79°
63°
1
83°
64°
2
83°
63°
3
84°
61°
4
83°
62°
5
82°
61°
6
83°
60°
7
81°
62°
8
82°
61°
9
81°
60°
10
83°
59°
11
82°
60°
12
82°
61°
13
83°
61°
14
83°
57°
15
77°
55°
16
76°
54°
17
79°
58°
18
76°
55°
19
80°
53°
20
78°
55°
21
76°
56°
22
79°
59°
23
81°
59°
24
81°
57°
25
80°
55°
26
79°
56°
27
80°
54°
28
73°
58°
29
78°
60°
30
80°
56°
31
79°
51°
1
79°
50°
2
72°
53°
3
72°
51°
4
73°
50°
5
72°
50°
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 72° to 84°, with overnight lows between 50° and 64°. The average high for August is 79° 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.
