S
M
T
W
T
F
S
30
87°
76°
31
88°
76°
1
89°
77°
2
89°
76°
3
88°
78°
4
88°
75°
5
89°
76°
6
87°
76°
7
88°
78°
8
87°
78°
9
89°
74°
10
89°
79°
11
89°
77°
12
89°
73°
13
89°
73°
14
89°
74°
15
90°
75°
16
88°
78°
17
87°
77°
18
88°
76°
19
89°
77°
20
90°
75°
21
89°
78°
22
88°
78°
23
89°
77°
24
88°
74°
25
89°
75°
26
88°
74°
27
87°
74°
28
88°
75°
29
86°
74°
30
84°
75°
1
85°
76°
2
85°
76°
3
85°
75°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Waikiki
Waikiki's September 2026 forecast shows daily high temperatures ranging from 84° to 90°, with overnight lows between 74° and 78°. The average high for September is 87° with an average low of 76°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Waikiki. See also: October | November | December.
