Weather in September
Sea temperature
The month with the coldest seawater in Dee Why, Australia, is September, with an average sea temperature of 18.6°C (65.5°F).Note: Swimming in water that is 18.6°C (65.5°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 is 11h and 53min.On the first day of the month, sunrise is at 6:12 am and sunset at 5:37 pm. On the last day of September, in Dee Why, sunrise is at 5:32 am and sunset at 5:56 pm AEST.
Frequently asked questions
What month is the sea coldest in Dee Why?
With an average sea temperature of 18.6°C (65.5°F), September is the month with the coldest seawater in Dee Why.
What is the sea water temperature in September in Dee Why?
In Dee Why, Australia, in September, the average water temperature is 18.6°C (65.5°F). For swimming, a surface water temperature of 18.6°C (65.5°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).
How many hours of daylight does Dee Why have in September?
In Dee Why, Australia, the average day length in September is 11h and 53min.
When is the sunrise / sunset in September in Dee Why?
In September, on the first day of the month, sunrise is at 6:12 am and sunset at 5:37 pm. On the last day of the month, in Dee Why, Australia, sunrise is at 5:32 am and sunset at 5:56 pm AEST.
Average sea temperature in September
Dee Why, Australia
- Average sea temperature in September: 18.6°C
The best month for swimming (with the highest average sea temperature) is February (23.7°C).
The coldest month (with the lowest average sea temperature) is September (18.6°C).
Average daylight in September
Dee Why, Australia
- Average daylight in September: 11h and 5min
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).
Dee Why, Australia
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