S
M
T
W
T
F
S
26
75°
47°
27
79°
49°
28
77°
49°
29
67°
62°
30
69°
62°
31
80°
61°
1
80°
57°
2
77°
60°
3
73°
64°
4
85°
60°
5
87°
58°
6
91°
59°
7
89°
66°
8
78°
65°
9
84°
64°
10
84°
63°
11
82°
64°
12
82°
58°
13
78°
57°
14
77°
57°
15
78°
52°
16
73°
51°
17
68°
63°
18
76°
60°
19
80°
55°
20
82°
64°
21
82°
63°
22
73°
63°
23
68°
61°
24
74°
61°
25
77°
62°
26
77°
56°
27
70°
64°
28
69°
58°
29
73°
56°
30
69°
59°
31
78°
56°
1
73°
60°
2
73°
58°
3
72°
57°
4
74°
57°
5
73°
55°
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 69° to 78°, with overnight lows between 55° and 64°. The average high for August is 73° 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.
