14.09
mon
mon
Day
79°F
SW 6 mph
Precip.
9%
9%
Night
72°F
W 4 mph
Precip.
19%
19%
15.09
tue
tue
Day
82°F
W 6 mph
Precip.
14%
14%
Night
73°F
W 6 mph
Precip.
29%
29%
16.09
wed
wed
Day
81°F
SW 11 mph
Precip.
13%
13%
Night
73°F
SW 9 mph
Precip.
35%
35%
17.09
thu
thu
Day
77°F
SW 10 mph
Precip.
30%
30%
Night
72°F
W 6 mph
Precip.
39%
39%
18.09
fri
fri
Day
79°F
W 12 mph
Precip.
23%
23%
Night
72°F
W 8 mph
Precip.
21%
21%
19.09
sat
sat
Day
79°F
W 14 mph
Precip.
15%
15%
Night
72°F
W 7 mph
Precip.
25%
25%
20.09
sun
sun
Day
79°F
W 12 mph
Precip.
12%
12%
Night
72°F
W 9 mph
Precip.
18%
18%
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 79.8°F. The highest and lowest sea temperatures during the month were 80.6°F and 79.3°F.
Air temperature in Oahu, °F
Precipitation total in Oahu, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Oahu
Oahu on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Oahu
Local time: 11:07
September 14, monday
1200
79°F
SW
6 mph
6 mph
1500
79°F
W
7 mph
7 mph
1800
75°F
SW
7 mph
7 mph
2100
72°F
SW
4 mph
4 mph
September 15, tuesday
0000
72°F
W
4 mph
4 mph
0300
72°F
W
4 mph
4 mph
0600
72°F
W
4 mph
4 mph
0900
77°F
W
6 mph
6 mph
