28.09
mon
mon
Day
79°F
W 16 mph
Precip.
29%
29%
Night
75°F
NW 17 mph
Precip.
43%
43%
29.09
tue
tue
Day
77°F
NW 11 mph
Precip.
26%
26%
Night
73°F
NW 11 mph
Precip.
27%
27%
30.09
wed
wed
Day
81°F
NW 12 mph
Precip.
29%
29%
Night
75°F
NW 12 mph
Precip.
30%
30%
01.10
thu
thu
Day
79°F
W 13 mph
Precip.
18%
18%
Night
75°F
NW 9 mph
Precip.
26%
26%
02.10
fri
fri
Day
79°F
W 10 mph
Precip.
3%
3%
Night
73°F
NW 8 mph
Precip.
23%
23%
03.10
sat
sat
Day
79°F
SW 7 mph
Precip.
5%
5%
Night
73°F
NW 1 mph
Precip.
8%
8%
04.10
sun
sun
Day
77°F
SE 8 mph
Precip.
7%
7%
Night
72°F
S 6 mph
Precip.
29%
29%
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 80.0°F. The highest and lowest sea temperatures during the month were 80.4°F and 79.0°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 81.3°F. The highest and lowest sea temperatures during the month were 81.9°F and 80.4°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: 03:12
September 28, monday
0600
73°F
W
16 mph
16 mph
0900
75°F
NW
16 mph
16 mph
1200
79°F
W
16 mph
16 mph
1500
79°F
W
17 mph
17 mph
1800
75°F
NW
15 mph
15 mph
2100
75°F
NW
16 mph
16 mph
September 29, tuesday
0000
75°F
NW
17 mph
17 mph
0300
73°F
NW
14 mph
14 mph
