S
M
T
W
T
F
S
26
72°
60°
27
77°
59°
28
85°
65°
29
69°
65°
30
73°
63°
31
75°
66°
1
85°
69°
2
86°
71°
3
80°
71°
4
87°
66°
5
88°
67°
6
86°
73°
7
94°
76°
8
92°
74°
9
90°
74°
10
85°
71°
11
89°
74°
12
84°
68°
13
83°
68°
14
83°
63°
15
78°
64°
16
79°
69°
17
81°
65°
18
78°
64°
19
81°
65°
20
80°
64°
21
79°
66°
22
79°
66°
23
75°
64°
24
74°
63°
25
75°
61°
26
78°
68°
27
81°
68°
28
74°
61°
29
74°
62°
30
77°
67°
31
77°
67°
1
74°
66°
2
78°
67°
3
80°
67°
4
78°
66°
5
76°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Harbor Islands
Harbor Islands's August 2026 forecast shows daily high temperatures ranging from 74° to 84°, with overnight lows between 61° and 69°. The average high for August is 78° with an average low of 65°. 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 Harbor Islands. See also: September | October | November.
