Current sea water temperature:
+77.7°F
| Minimum sea water temperature in December: | 79.5°F |
| Maximum sea water temperature in December: | 75.0°F |
| Average sea water temperature in December: | 77.5°F |
| more information | |
14 days
forecast
forecast
| Hilo |
monthly
weather
weather
| Hilo |
Sea water temperature for the last 10 days:
| December 17 | 77.7°F | December 12 | 77.9°F |
| December 16 | 77.7°F | December 11 | 78.1°F |
| December 15 | 77.7°F | December 10 | 78.1°F |
| December 14 | 77.9°F | December 9 | 78.4°F |
| December 13 | 77.7°F | December 8 | 78.3°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:
2025
2024
2023
The average sea water temperature in August of 2025 was 79.9°F. The highest and lowest sea temperatures during the month were 80.6°F and 79.2°F.
current
weather
weather
| Hilo |
weather in
December
December
| Hilo |
Best time for vacation in Hilo
Hilo on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Hilo
Local time: 09:08
December 17, wednesday
1200
77°F
NW
15 mph
15 mph
1500
77°F
NW
16 mph
16 mph
1800
72°F
N
12 mph
12 mph
2100
72°F
N
7 mph
7 mph
December 18, thursday
0000
72°F
NE
6 mph
6 mph
0300
70°F
NE
5 mph
5 mph
0600
70°F
NE
6 mph
6 mph
0900
75°F
N
8 mph
8 mph
