S
M
T
W
T
F
S
26
95°
77°
27
97°
79°
28
97°
77°
29
91°
77°
30
90°
72°
31
91°
70°
1
82°
73°
2
77°
69°
3
88°
66°
4
88°
66°
5
91°
66°
6
95°
68°
7
95°
72°
8
90°
73°
9
N/A
10
96°
75°
11
94°
76°
12
98°
75°
13
97°
77°
14
97°
73°
15
100°
75°
16
99°
75°
17
98°
76°
18
93°
73°
19
93°
74°
20
91°
71°
21
91°
71°
22
90°
70°
23
94°
75°
24
92°
72°
25
91°
73°
26
93°
74°
27
93°
74°
28
92°
73°
29
92°
73°
30
86°
72°
31
84°
71°
1
84°
71°
2
86°
70°
3
90°
72°
4
89°
72°
5
90°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Deans Island
Deans Island's August 2026 forecast shows daily high temperatures ranging from 84° to 100°, with overnight lows between 70° and 77°. The average high for August is 92° with an average low of 73°. 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 Deans Island. See also: September | October | November.