Measurements:
°C
°F
CURRENT WEATHER
09:16
Kauai
80°F
W 9 mph
Feels like: 84°F
Precip: 29%
World Resorts USA Kauai Weather

7 Day Weather Forecast

08.05
wed
DAY
82°F
W 12 mph
precip
21%
NIGHT
78°F
W 11 mph
precip
33%
08.06
thu
DAY
82°F
W 12 mph
precip
21%
NIGHT
78°F
W 9 mph
precip
31%
08.07
fri
DAY
82°F
W 12 mph
precip
21%
NIGHT
78°F
W 11 mph
precip
17%
08.08
sat
DAY
82°F
W 13 mph
precip
17%
NIGHT
78°F
W 12 mph
precip
32%
08.09
sun
DAY
82°F
W 12 mph
precip
19%
NIGHT
78°F
W 11 mph
precip
32%
08.10
mon
DAY
82°F
W 11 mph
precip
15%
NIGHT
78°F
W 8 mph
precip
14%
08.11
tue
DAY
84°F
W 11 mph
precip
12%
NIGHT
78°F
W 10 mph
precip
31%

Kauai Sea Water Temperature in August, °F

Select Year: 2025 2024 2023

The average sea surface temperature in August 2025 for Kauai was 26.1°F. The maximum and minimum values were 24.5°F and 27.4°F respectively.

Kauai on the Weather Map

Best Time to Visit Kauai
The most sunny months:
January 6 days
December 5 days
February 4 days
The most warm months:
September 83.7 °F
August 83.4 °F
October 82.4 °F
Warmest sea temperature:
September 83.9 °F
October 83.8 °F
August 82.9 °F
The most cold months:
February 76.2 °F
March 76.9 °F
January 77.4 °F
The most rainy months:
March 2 days
January 2 days
February 2 days
The most windy months:
July 11 mph
June 11 mph
May 11 mph
more details