Current sea water temperature:
+76.1°F
| Minimum sea water temperature in May: | 78.8°F |
| Maximum sea water temperature in May: | 74.5°F |
| Average sea water temperature in May: | 76.8°F |
| more information | |
14 days
forecast
forecast
| Kauai |
monthly
weather
weather
| Kauai |
Sea water temperature for the last 10 days:
| May 16 | 76.1°F | May 11 | 76.3°F |
| May 15 | 75.9°F | May 10 | 76.3°F |
| May 14 | 76.1°F | May 9 | 76.3°F |
| May 13 | 76.1°F | May 8 | 76.1°F |
| May 12 | 76.3°F | May 7 | 76.3°F |
Monthly sea water temperature, °F
When is the warmest sea in Kauai?
Based on the data about daily sea water temperature for the last three years the warmest sea in Kauai was noticed in September, October and August.
Monthly Sea Temperatures in Kauai, °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.
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.
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 79.1°F. The highest and lowest sea temperatures during the month were 81.3°F and 76.1°F.
current
weather
weather
| Kauai |
weather in
May
May
| Kauai |
Best time for vacation in Kauai
Kauai on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Kauai
Local time: 11:53
May 16, saturday
1200
77°F
W
12 mph
12 mph
1500
77°F
W
13 mph
13 mph
1800
75°F
W
12 mph
12 mph
2100
73°F
W
9 mph
9 mph
May 17, sunday
0000
73°F
W
9 mph
9 mph
0300
73°F
W
7 mph
7 mph
0600
73°F
W
8 mph
8 mph
0900
75°F
W
9 mph
9 mph
