Weather in September
The ideal ocean temperature of 80.1°F (26.7°C) makes
September in
Punaluu,
Hawaii, the best time for swimming and other water activities.
Ocean temperature
The month with the warmest seawater is September, with an average ocean temperature of 80.1°F (26.7°C).
Note: Water activities including swimming and diving are pleasurable in temperatures between 77°F (25°C) and 84.2°F (29°C), ensuring comfort and enjoyment for extended time frames.
Daylight
In Punaluu, Hawaii, the average length of the day in September is 12h and 16min.
On the first day of the month, sunrise is at 6:15 am and sunset at 6:47 pm. On the last day of September, sunrise is at 6:22 am and sunset at 6:19 pm HST.