Current sea water temperature:
+78.3°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 4 | 78.3°F | November 29 | 79.0°F |
| December 3 | 78.6°F | November 28 | 79.0°F |
| December 2 | 78.8°F | November 27 | 79.0°F |
| December 1 | 78.8°F | November 26 | 79.0°F |
| November 30 | 79.2°F | November 25 | 79.0°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: 20:46
December 04, thursday
2100
70°F
NW
6 mph
6 mph
December 05, friday
0000
72°F
W
8 mph
8 mph
0300
70°F
NW
6 mph
6 mph
0600
68°F
NW
5 mph
5 mph
0900
70°F
NW
7 mph
7 mph
1200
70°F
NW
11 mph
11 mph
1500
68°F
W
9 mph
9 mph
1800
66°F
NW
6 mph
6 mph
