27.09
sun
sun
Day
77°F
NW 9 mph
Precip.
20%
20%
Night
77°F
NW 6 mph
Precip.
11%
11%
28.09
mon
mon
Day
79°F
NW 11 mph
Precip.
14%
14%
Night
75°F
N 8 mph
Precip.
16%
16%
29.09
tue
tue
Day
77°F
NW 13 mph
Precip.
5%
5%
Night
77°F
NW 9 mph
Precip.
21%
21%
30.09
wed
wed
Day
79°F
NW 16 mph
Precip.
7%
7%
Night
77°F
NW 5 mph
Precip.
14%
14%
01.10
thu
thu
Day
77°F
SW 6 mph
Precip.
5%
5%
Night
75°F
NE 4 mph
Precip.
28%
28%
02.10
fri
fri
Day
77°F
W 7 mph
Precip.
29%
29%
Night
75°F
W 4 mph
Precip.
13%
13%
03.10
sat
sat
Day
75°F
W 6 mph
Precip.
24%
24%
Night
75°F
NW 6 mph
Precip.
5%
5%
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 81.2°F. The highest and lowest sea temperatures during the month were 81.7°F and 80.6°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.
Air temperature in Hilo, °F
Precipitation total in Hilo, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Hilo
Hilo on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Hilo
Local time: 13:08
September 27, sunday
1500
77°F
W
9 mph
9 mph
1800
77°F
W
6 mph
6 mph
2100
77°F
N
4 mph
4 mph
September 28, monday
0000
77°F
NW
6 mph
6 mph
0300
73°F
NE
9 mph
9 mph
0600
75°F
NE
9 mph
9 mph
0900
77°F
NW
8 mph
8 mph
1200
79°F
NW
11 mph
11 mph
