World Resorts USA Kauai Weather

Kauai 14 Days Forecast

25.08
tue
Day
79°F
W 15 mph
Precip.
20%
Night
75°F
W 10 mph
Precip.
22%
26.08
wed
Day
79°F
W 13 mph
Precip.
20%
Night
73°F
W 11 mph
Precip.
27%
27.08
thu
Day
77°F
W 11 mph
Precip.
23%
Night
73°F
W 11 mph
Precip.
36%
28.08
fri
Day
79°F
W 11 mph
Precip.
18%
Night
73°F
W 12 mph
Precip.
32%
29.08
sat
Day
75°F
W 14 mph
Precip.
20%
Night
73°F
W 12 mph
Precip.
36%
30.08
sun
Day
77°F
W 12 mph
Precip.
9%
Night
73°F
W 11 mph
Precip.
37%
31.08
mon
Day
77°F
W 12 mph
Precip.
27%
Night
73°F
W 11 mph
Precip.
43%
01.09
tue
Day
77°F
W 13 mph
Precip.
49%
Night
75°F
W 12 mph
Precip.
40%
02.09
wed
Day
77°F
W 13 mph
Precip.
25%
Night
73°F
W 11 mph
Precip.
30%
03.09
thu
Day
77°F
W 14 mph
Precip.
40%
Night
73°F
W 11 mph
Precip.
21%
04.09
fri
Day
77°F
W 11 mph
Precip.
13%
Night
73°F
W 11 mph
Precip.
50%
05.09
sat
Day
77°F
W 12 mph
Precip.
22%
Night
73°F
W 10 mph
Precip.
27%
06.09
sun
Day
77°F
W 12 mph
Precip.
20%
Night
73°F
W 9 mph
Precip.
19%
07.09
mon
Day
79°F
W 10 mph
Precip.
5%
Night
75°F
W 9 mph
Precip.
7%

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

Sunniest months:
January 6 days
December 5 days
February 4 days
Warmest months:
September 80.3 °F
August 80.0 °F
October 79.1 °F
Warmest sea temp:
September 80.6 °F
October 80.4 °F
August 79.7 °F
Coldest months:
February 73.6 °F
March 74.2 °F
January 74.6 °F
Rainiest months:
March 2 days
January 2 days
February 2 days
Windiest months:
July 11.7 mph
June 10.8 mph
May 10.8 mph

Kauai on a weather map

Current weather
10:16
Kauai
+77°F
W 14 mph
Feels like: +81°F
Precip.: 22%
Places in USA:
Name
°F
Boston
+81°F
Washington
+86°F
Hawaii
+79°F
Las Vegas
+106°F
Los Angeles
+95°F
Miami
+91°F
Maui
+64°F
Myrtle Beach
+84°F
New York
+79°F
San Diego
+90°F
San Francisco
+66°F
Santa Monica
+81°F
Sarasota
+95°F
Houston
+102°F
Chicago
+79°F
all places
24 Hours Forecast
Kauai
Local time: 10:16
August 25, tuesday
1200
79°F
W
15 mph
1500
81°F
W
12 mph
1800
77°F
W
12 mph
2100
75°F
W
9 mph
August 26, wednesday
0000
75°F
W
10 mph
0300
73°F
W
11 mph
0600
73°F
W
11 mph
0900
77°F
W
13 mph
Units of measurement: °C / °F