Current sea water temperature:
+81.0°F
| Minimum sea water temperature in September: | 84.2°F |
| Maximum sea water temperature in September: | 77.7°F |
| Average sea water temperature in September: | 80.7°F |
| more information | |
14 days
forecast
forecast
| Hawaii |
monthly
weather
weather
| Hawaii |
Sea water temperature for the last 10 days:
| September 16 | 81.0°F | September 11 | 80.6°F |
| September 15 | 81.1°F | September 10 | 80.6°F |
| September 14 | 81.0°F | September 9 | 80.4°F |
| September 13 | 81.0°F | September 8 | 80.8°F |
| September 12 | 80.8°F | September 7 | 81.0°F |
Monthly sea water temperature, °F
When is the warmest sea in Hawaii?
Based on the data about daily sea water temperature for the last three years the warmest sea in Hawaii was noticed in September, October and August.
Monthly Sea Temperatures in Hawaii, °F
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 80.8°F. The highest and lowest sea temperatures during the month were 81.1°F and 80.4°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 80.6°F. The highest and lowest sea temperatures during the month were 81.0°F and 79.7°F.
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 80.8°F. The highest and lowest sea temperatures during the month were 81.3°F and 80.2°F.
current
weather
weather
| Hawaii |
weather in
September
September
| Hawaii |
Best time for vacation in Hawaii
Hawaii on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Hawaii
Local time: 20:20
September 16, wednesday
2100
79°F
SW
22 mph
22 mph
September 17, thursday
0000
79°F
SW
21 mph
21 mph
0300
79°F
SW
19 mph
19 mph
0600
77°F
SW
19 mph
19 mph
0900
79°F
SW
20 mph
20 mph
1200
79°F
SW
24 mph
24 mph
1500
79°F
SW
24 mph
24 mph
1800
79°F
SW
21 mph
21 mph
