Oak Island Weather in September

The climate in Oak Island during September can be summarized as hot, humid and wet.

September is in the fall / autumn in Oak Island and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a muggy 29°C (83°F), whilst at night 18°C (65°F) is normal.

On average September is the 2nd wettest month of the year in Oak Island with around 176mm 6.9 inches of rain making it a wet time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.2 hours of sunshine per day.

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Oak Island in September 2025.