‹ Kailua-Kona weather by month
Typical September weather
Kailua-Kona
Hawaii · September
87° days
75° nights
maybe one rainy day · 12 hours of daylight · ocean 82°
What to pack
- Swimsuit
- Sunscreen
What September feels like
September is the calmest month on this coast, and the winter crowd hasn't booked yet. The Ironman training bikes are unmistakable on the Queen K all month, ridden by people who look like they haven't eaten since Tuesday.
Real rain shows up maybe one day all month; the rest stay dry.
Can you swim?
The ocean runs about 82° — bath-warm.
The numbers
| Typical high | 87° |
|---|---|
| Typical low | 75° |
| Days with real rain | 1 |
| Total rain | 0.5 in |
| Water temperature | 82° |
| Sunrise / sunset (mid-month) | 6:11 am / 6:26 pm |