19.05
tue
tue
Day
75°F
SW 7 mph
Precip.
100%
100%
Night
72°F
SW 4 mph
Precip.
100%
100%
20.05
wed
wed
Day
73°F
SW 11 mph
Precip.
100%
100%
Night
72°F
SW 8 mph
Precip.
100%
100%
21.05
thu
thu
Day
72°F
SW 11 mph
Precip.
100%
100%
Night
70°F
S 9 mph
Precip.
100%
100%
22.05
fri
fri
Day
72°F
SW 12 mph
Precip.
84%
84%
Night
70°F
S 9 mph
Precip.
73%
73%
23.05
sat
sat
Day
72°F
SW 11 mph
Precip.
100%
100%
Night
70°F
SW 7 mph
Precip.
100%
100%
24.05
sun
sun
Day
72°F
SW 9 mph
Precip.
100%
100%
Night
66°F
SE 4 mph
Precip.
100%
100%
25.05
mon
mon
Day
73°F
SW 8 mph
Precip.
100%
100%
Night
70°F
NW 4 mph
Precip.
20%
20%
Sea water temperature in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 78.1°F. The highest and lowest sea temperatures during the month were 78.6°F and 77.4°F.
Sea water temperature in June, °F
Show year:
2025
2024
2023
The average sea water temperature in June of 2025 was 78.6°F. The highest and lowest sea temperatures during the month were 79.2°F and 78.3°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: 04:41
May 19, tuesday
0600
72°F
W
2 mph
2 mph
0900
73°F
W
8 mph
8 mph
1200
75°F
SW
7 mph
7 mph
1500
75°F
SW
10 mph
10 mph
1800
73°F
SW
9 mph
9 mph
2100
73°F
SW
6 mph
6 mph
May 20, wednesday
0000
72°F
SW
4 mph
4 mph
0300
72°F
SW
2 mph
2 mph
