September weather forecastPort Denison, Australia
September
Weather in September
Sea temperature
In Port Denison, Australia, the average seawater temperature in September is 19.8°C (67.6°F).Note: Swimming in water that is 19.8°C (67.6°F) is not enjoyable for most. Breathing becomes more challenging to manage as the water temperature dips from 21°C (69.8°F) to 15°C (59°F).
Daylight
The average length of the day in September in Port Denison is 11h and 55min.On the first day of September in Port Denison, sunrise is at 6:34 am and sunset at 6:05 pm. On the last day of the month, sunrise is at 5:59 am and sunset at 6:20 pm AWST.
Updated: Jan 26, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
In Port Denison, Australia, in September, the average water temperature is 19.8°C (67.6°F). For most, swimming in 19.8°C (67.6°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).
In September, the average day length in Port Denison, Australia, is 11h and 55min.
On the first day of September in Port Denison, Australia, sunrise is at 6:34 am and sunset at 6:05 pm. On the last day of the month, sunrise is at 5:59 am and sunset at 6:20 pm AWST.
Average sea temperature in September
Port Denison, Australia
- Average sea temperature in September: 19.8°C
The best month for swimming (with the highest average sea temperature) is March (24.3°C).
The coldest month (with the lowest average sea temperature) is October (19.7°C).
Average daylight in September
Port Denison, Australia
- Average daylight in September: 11h and 54min
The month with the longest days is December (Average daylight: 14h and 0min).
The month with the shortest days is June (Average daylight: 10h and 18min).





