Hawaii, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Hanapepe, HI

An excellent water temperature of 78.1°F (25.6°C) makes May in Hanapepe, Hawaii, a prime for swimming and other water activities.

Ocean temperature

In Hanapepe, in May, the average water temperature is 78.1°F (25.6°C).
Note: Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.


In May, the average length of the day in Hanapepe is 13.2h.

What is the water temperature in May in Hanapepe?

In Hanapepe, the average seawater temperature in May is 78.1°F (25.6°C). For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the average length of the day in May in Hanapepe?

In May, the average length of the day in Hanapepe, Hawaii, is 13.2h.
Average sea temperature in May - Hanapepe, HI
  • Average sea temperature in May: 78.1°F

The best month for swimming (with the highest average sea temperature) is September (80.5°F).
The coldest month (with the lowest average sea temperature) is March (75.4°F).

Average daylight in May - Hanapepe, HI
  • Average daylight in May: 13.2h

The month with the longest days is June (Average daylight: 13.5h).
The month with shortest days is December (Average daylight: 10.8h).