14.09
mon
mon
Day
77°F
W 11 mph
Precip.
4%
4%
Night
73°F
W 8 mph
Precip.
20%
20%
15.09
tue
tue
Day
79°F
W 12 mph
Precip.
26%
26%
Night
73°F
W 9 mph
Precip.
34%
34%
16.09
wed
wed
Day
79°F
W 11 mph
Precip.
22%
22%
Night
75°F
W 10 mph
Precip.
49%
49%
17.09
thu
thu
Day
77°F
W 11 mph
Precip.
50%
50%
Night
75°F
W 12 mph
Precip.
67%
67%
18.09
fri
fri
Day
79°F
W 13 mph
Precip.
49%
49%
Night
75°F
NW 11 mph
Precip.
43%
43%
19.09
sat
sat
Day
79°F
W 13 mph
Precip.
24%
24%
Night
75°F
NW 11 mph
Precip.
37%
37%
20.09
sun
sun
Day
79°F
W 13 mph
Precip.
26%
26%
Night
73°F
W 11 mph
Precip.
30%
30%
21.09
mon
mon
Day
77°F
W 13 mph
Precip.
24%
24%
Night
73°F
W 11 mph
Precip.
39%
39%
22.09
tue
tue
Day
77°F
W 13 mph
Precip.
29%
29%
Night
73°F
W 11 mph
Precip.
36%
36%
23.09
wed
wed
Day
75°F
W 13 mph
Precip.
45%
45%
Night
73°F
W 14 mph
Precip.
61%
61%
24.09
thu
thu
Day
75°F
W 12 mph
Precip.
25%
25%
Night
73°F
W 12 mph
Precip.
38%
38%
25.09
fri
fri
Day
75°F
W 12 mph
Precip.
62%
62%
Night
73°F
W 11 mph
Precip.
17%
17%
26.09
sat
sat
Day
77°F
W 11 mph
Precip.
13%
13%
Night
73°F
W 9 mph
Precip.
37%
37%
27.09
sun
sun
Day
77°F
W 11 mph
Precip.
23%
23%
Night
73°F
W 8 mph
Precip.
35%
35%
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 81.5°F. The highest and lowest sea temperatures during the month were 81.9°F and 81.1°F.
Air temperature in Kauai, °F
Precipitation total in Kauai, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Kauai
Kauai on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Kauai
Local time: 10:56
September 14, monday
1200
77°F
W
11 mph
11 mph
1500
77°F
W
11 mph
11 mph
1800
75°F
W
9 mph
9 mph
2100
73°F
W
9 mph
9 mph
September 15, tuesday
0000
73°F
W
8 mph
8 mph
0300
72°F
NW
7 mph
7 mph
0600
72°F
W
8 mph
8 mph
0900
75°F
W
10 mph
10 mph
