S
M
T
W
T
F
S
26
79°
61°
27
74°
60°
28
74°
61°
29
75°
61°
30
74°
62°
31
74°
60°
1
73°
61°
2
74°
63°
3
77°
63°
4
76°
64°
5
75°
64°
6
77°
63°
7
75°
66°
8
77°
66°
9
78°
65°
10
79°
66°
11
78°
65°
12
77°
65°
13
79°
61°
14
76°
60°
15
74°
62°
16
77°
65°
17
79°
65°
18
Hist. Avg.
76°
62°
19
Hist. Avg.
76°
62°
20
Hist. Avg.
76°
62°
21
Hist. Avg.
75°
62°
22
Hist. Avg.
75°
62°
23
Hist. Avg.
75°
62°
24
Hist. Avg.
75°
62°
25
Hist. Avg.
75°
61°
26
Hist. Avg.
75°
61°
27
Hist. Avg.
75°
61°
28
Hist. Avg.
74°
61°
29
Hist. Avg.
74°
61°
30
Hist. Avg.
74°
60°
31
Hist. Avg.
74°
60°
1
Hist. Avg.
74°
60°
2
Hist. Avg.
74°
60°
3
Hist. Avg.
73°
60°
4
Hist. Avg.
73°
60°
5
Hist. Avg.
73°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Nantucket
Nantucket's August 2026 forecast shows daily high temperatures ranging from 73° to 79°, with overnight lows between 60° and 66°. The average high for August is 76° with an average low of 63°. 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 Nantucket. See also: September | October | November.
