September weather forecastCronulla, Australia
September
Weather in September
Sea temperature
September is the month with the coldest seawater in Cronulla, Australia, with an average sea temperature of 18.4°C (65.1°F).Note: Most people do not find pleasure in swimming when the water temperature is 18.4°C (65.1°F). Breathing becomes increasingly difficult to manage as the water temperature drops from 21°C (69.8°F) to 15°C (59°F).
Daylight
In Cronulla, the average length of the day in September is 11h and 53min.On the first day of the month, sunrise is at 6:13 am and sunset at 5:37 pm. On the last day of September, sunrise is at 5:33 am and sunset at 5:57 pm AEST.
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
With an average sea temperature of 18.4°C (65.1°F), September is the month with the coldest seawater.
In Cronulla, Australia, in September, the average water temperature is 18.4°C (65.1°F). Swimming in 18.4°C (65.1°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).
The average day length in September in Cronulla is 11h and 53min.
In September, on the first day of the month, sunrise is at 6:13 am and sunset at 5:37 pm. On the last day of the month, in Cronulla, Australia, sunrise is at 5:33 am and sunset at 5:57 pm AEST.
Average sea temperature in September
Cronulla, Australia
- Average sea temperature in September: 18.4°C
The best month for swimming (with the highest average sea temperature) is February (23.8°C).
The coldest month (with the lowest average sea temperature) is September (18.4°C).
Average daylight in September
Cronulla, Australia
- Average daylight in September: 11h and 54min
The month with the longest days is December (Average daylight: 14h and 24min).
The month with the shortest days is June (Average daylight: 9h and 54min).





