25.08
tue
tue
Day
79°F
W 15 mph
Precip.
20%
20%
Night
75°F
W 10 mph
Precip.
22%
22%
26.08
wed
wed
Day
79°F
W 13 mph
Precip.
20%
20%
Night
73°F
W 11 mph
Precip.
27%
27%
27.08
thu
thu
Day
77°F
W 11 mph
Precip.
23%
23%
Night
73°F
W 11 mph
Precip.
36%
36%
28.08
fri
fri
Day
79°F
W 11 mph
Precip.
18%
18%
Night
73°F
W 12 mph
Precip.
32%
32%
29.08
sat
sat
Day
75°F
W 14 mph
Precip.
20%
20%
Night
73°F
W 12 mph
Precip.
36%
36%
30.08
sun
sun
Day
77°F
W 12 mph
Precip.
9%
9%
Night
73°F
W 11 mph
Precip.
37%
37%
31.08
mon
mon
Day
77°F
W 12 mph
Precip.
27%
27%
Night
73°F
W 11 mph
Precip.
43%
43%
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 80.4°F. The highest and lowest sea temperatures during the month were 81.0°F and 79.3°F.
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: 10:58
August 25, tuesday
1200
79°F
W
15 mph
15 mph
1500
81°F
W
12 mph
12 mph
1800
77°F
W
12 mph
12 mph
2100
75°F
W
9 mph
9 mph
August 26, wednesday
0000
75°F
W
10 mph
10 mph
0300
73°F
W
11 mph
11 mph
0600
73°F
W
11 mph
11 mph
0900
77°F
W
13 mph
13 mph
