Weather in December
Sea temperature
In Oyster Bay, Australia, in December, the average water temperature is 21.6°C (70.9°F).Note: The majority of people find swimming in 21.6°C (70.9°F) unenjoyable. As the water temperature decreases from 21°C (69.8°F) to 15°C (59°F), breathing becomes more challenging to control.
Daylight
December has the longest days of the year, with an average of 14h and 24min of daylight.On the first day of December, sunrise is at 5:37 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 5:47 am and sunset at 8:10 pm AEDT.
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
What is the sea water temperature in December in Oyster Bay?
In Oyster Bay, the average seawater temperature in December is 21.6°C (70.9°F). For swimming, a surface water temperature of 21.6°C (70.9°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).
When are the longest days in Oyster Bay?
December has the longest days of the year, with an average of 14h and 24min of daylight.
How many hours of daylight does Oyster Bay have in December?
In December, the average day length in Oyster Bay is 14h and 23min.
When is the sunrise / sunset in December in Oyster Bay?
On the first day of December in Oyster Bay, Australia, sunrise is at 5:37 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 5:47 am and sunset at 8:10 pm AEDT.
Average sea temperature in December
Oyster Bay, Australia
- Average sea temperature in December: 21.6°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 December
Oyster Bay, Australia
- Average daylight in December: 14h and 2min
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).
Oyster Bay, Australia
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