Current sea water temperature:
+79.9°F
| Minimum sea water temperature in September: | 81.9°F |
| Maximum sea water temperature in September: | 79.0°F |
| Average sea water temperature in September: | 80.5°F |
| more information | |
14 days
forecast
forecast
| Kauai |
monthly
weather
weather
| Kauai |
Sea water temperature for the last 10 days:
| September 14 | 79.9°F | September 9 | 79.0°F |
| September 13 | 79.5°F | September 8 | 79.7°F |
| September 12 | 79.9°F | September 7 | 79.7°F |
| September 11 | 79.9°F | September 6 | 79.7°F |
| September 10 | 79.5°F | September 5 | 79.9°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:
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.
current
weather
weather
| Kauai |
weather in
September
September
| Kauai |
Best time for vacation in Kauai
Kauai on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Kauai
Local time: 10:42
September 14, monday
1200
77°F
W
11 mph
11 mph
1500
77°F
W
11 mph
11 mph
1800
75°F
W
9 mph
9 mph
2100
73°F
W
9 mph
9 mph
September 15, tuesday
0000
73°F
W
8 mph
8 mph
0300
72°F
NW
7 mph
7 mph
0600
72°F
W
8 mph
8 mph
0900
75°F
W
10 mph
10 mph
