Current sea water temperature:
+80.8°F
| Minimum sea water temperature in September: | 83.8°F |
| Maximum sea water temperature in September: | 77.5°F |
| Average sea water temperature in September: | 80.4°F |
| more information | |
14 days
forecast
forecast
| Hilo |
monthly
weather
weather
| Hilo |
Sea water temperature for the last 10 days:
| September 5 | 80.8°F | August 31 | 81.5°F |
| September 4 | 81.1°F | August 30 | 81.1°F |
| September 3 | 81.5°F | August 29 | 81.3°F |
| September 2 | 81.3°F | August 28 | 81.5°F |
| September 1 | 81.5°F | August 27 | 81.5°F |
Monthly sea water temperature, °F
When is the warmest sea in Hilo?
Based on the data about daily sea water temperature for the last three years the warmest sea in Hilo was noticed in September, October and August.
Monthly Sea Temperatures in Hilo, °F
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 80.4°F. The highest and lowest sea temperatures during the month were 80.8°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 80.3°F. The highest and lowest sea temperatures during the month were 80.8°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 81.0°F. The highest and lowest sea temperatures during the month were 81.9°F and 79.9°F.
current
weather
weather
| Hilo |
weather in
September
September
| Hilo |
Best time for vacation in Hilo
Hilo on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Hilo
Local time: 11:20
September 05, saturday
1200
77°F
SW
6 mph
6 mph
1500
77°F
SW
7 mph
7 mph
1800
79°F
SW
7 mph
7 mph
2100
77°F
S
2 mph
2 mph
September 06, sunday
0000
77°F
SW
1 mph
1 mph
0300
75°F
SE
2 mph
2 mph
0600
77°F
N
2 mph
2 mph
0900
77°F
NW
6 mph
6 mph
