Weather in September
September, though still warm, marks the beginning of a cooling trend in Kahaluu. As the sea temperature attains its highest annual average of 80.4°F (26.9°C) in this month, bathing in the ocean offers a unique delight. Traditionally, September weather offers sunlit days and bright, clear skies. Although experiencing slightly diminished daylight, it's nonetheless an ideal month for outdoor attractions and water sports.
Note: For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.
On the first day of September, sunrise is at 6:14 am and sunset at 6:47 pm. On the last day of the month, sunrise is at 6:22 am and sunset at 6:19 pm HST.
Ocean temperature
September is the month with the warmest seawater, with an average ocean temperature of 80.4°F (26.9°C).Note: For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.
Daylight
The average length of the day in September in Kahaluu is 12h and 16min.On the first day of September, sunrise is at 6:14 am and sunset at 6:47 pm. On the last day of the month, sunrise is at 6:22 am and sunset at 6:19 pm HST.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
When is the ocean warmest in Kahaluu?
With an average ocean temperature of 80.4°F (26.9°C), September is the month with the warmest seawater in Kahaluu, Hawaii.
How warm is the water in September in Kahaluu?
In September, the average ocean temperature in Kahaluu is 80.4°F (26.9°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.
How many hours of daylight does Kahaluu have in September?
The average day length in September in Kahaluu, Hawaii, is 12h and 16min.
When are sunrise and sunset in September in Kahaluu?
On the first day of September in Kahaluu, sunrise is at 6:14 am and sunset at 6:47 pm. On the last day of the month, sunrise is at 6:22 am and sunset at 6:19 pm HST.
Average sea temperature in September
Kahaluu, HI
- Average sea temperature in September: 80.4°F
The best month for swimming (with the highest average sea temperature) is September (80.4°F).
The coldest month (with the lowest average sea temperature) is March (75.7°F).
Average daylight in September
Kahaluu, HI
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 13h and 24min).
The month with the shortest days is December (Average daylight: 10h and 54min).
Kahaluu, Hawaii, USA
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