Current sea water temperature:
+79.3°F
| Minimum sea water temperature in July: | 80.6°F |
| Maximum sea water temperature in July: | 75.6°F |
| Average sea water temperature in July: | 78.6°F |
| more information | |
14 days
forecast
forecast
| Kauai |
monthly
weather
weather
| Kauai |
Sea water temperature for the last 10 days:
| July 16 | 79.3°F | July 11 | 79.0°F |
| July 15 | 79.2°F | July 10 | 78.8°F |
| July 14 | 79.3°F | July 9 | 78.4°F |
| July 13 | 79.2°F | July 8 | 78.3°F |
| July 12 | 79.2°F | July 7 | 78.4°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
July
July
| Kauai |
Best time for vacation in Kauai
Kauai on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Kauai
Local time: 02:01
July 16, thursday
0300
73°F
NW
9 mph
9 mph
0600
73°F
W
9 mph
9 mph
0900
77°F
W
11 mph
11 mph
1200
79°F
W
12 mph
12 mph
1500
81°F
W
14 mph
14 mph
1800
79°F
W
12 mph
12 mph
2100
75°F
W
11 mph
11 mph
July 17, friday
0000
75°F
W
11 mph
11 mph
