The weather in Waikiki in September is very hot. The average temperatures are between 24°C and 28°C, drinking water regularly is advisable.
You can expect a few rainy days in Waikiki during September, but usually the weather is comfortable in September.
Our weather forecast can give you a great sense of what weather to expect in Waikiki in September 2025.
If you’re planning to visit Waikiki in the near future, we highly recommend that you review the 14 day weather forecast for Waikiki before you arrive.
Temperatures
28° / 24°
Rainy Days
2
Snowy Days
0
Dry Days
28
Rainfall
23
mm
Sun Hours
7.2
Hrs