S
M
T
W
T
F
S
26
70°
48°
27
73°
44°
28
73°
53°
29
68°
61°
30
69°
63°
31
78°
60°
1
76°
55°
2
77°
62°
3
70°
65°
4
82°
59°
5
83°
55°
6
86°
61°
7
85°
66°
8
78°
64°
9
86°
62°
10
83°
59°
11
84°
61°
12
83°
58°
13
78°
56°
14
77°
56°
15
75°
52°
16
70°
52°
17
68°
62°
18
74°
63°
19
73°
61°
20
75°
58°
21
75°
53°
22
70°
57°
23
68°
59°
24
70°
57°
25
69°
56°
26
68°
57°
27
70°
56°
28
68°
55°
29
70°
54°
30
69°
55°
31
66°
51°
1
66°
53°
2
67°
53°
3
68°
57°
4
66°
58°
5
66°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Deer Isle
Deer Isle's August 2026 forecast shows daily high temperatures ranging from 66° to 75°, with overnight lows between 51° and 63°. The average high for August is 69° with an average low of 57°. 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 Deer Isle. See also: September | October | November.
