Current sea water temperature:
+81.1°F
| Minimum sea water temperature in September: | 84.4°F |
| Maximum sea water temperature in September: | 77.7°F |
| Average sea water temperature in September: | 80.9°F |
| more information | |
14 days
forecast
forecast
| Honolulu |
monthly
weather
weather
| Honolulu |
Sea water temperature for the last 10 days:
| September 14 | 81.1°F | September 9 | 81.0°F |
| September 13 | 81.3°F | September 8 | 81.1°F |
| September 12 | 81.1°F | September 7 | 81.3°F |
| September 11 | 81.1°F | September 6 | 81.1°F |
| September 10 | 81.0°F | September 5 | 81.1°F |
Monthly sea water temperature, °F
When is the warmest sea in Honolulu?
Based on the data about daily sea water temperature for the last three years the warmest sea in Honolulu was noticed in September, October and August.
Monthly Sea Temperatures in Honolulu, °F
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 80.6°F. The highest and lowest sea temperatures during the month were 81.5°F and 80.1°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 80.7°F. The highest and lowest sea temperatures during the month were 81.1°F and 79.9°F.
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 81.0°F. The highest and lowest sea temperatures during the month were 81.5°F and 80.4°F.
current
weather
weather
| Honolulu |
weather in
September
September
| Honolulu |
Best time for vacation in Honolulu
Honolulu on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Honolulu
Local time: 10:19
September 14, monday
1200
79°F
SW
16 mph
16 mph
1500
79°F
SW
13 mph
13 mph
1800
79°F
SW
13 mph
13 mph
2100
77°F
SW
12 mph
12 mph
September 15, tuesday
0000
77°F
SW
13 mph
13 mph
0300
77°F
SW
11 mph
11 mph
0600
77°F
SW
12 mph
12 mph
0900
79°F
SW
14 mph
14 mph
