Climate and monthly weather forecast
Weather in January
In January, the average sea temperature in Dee Why, Australia, is 23.3°C (73.9°F). Note: Taking into account a person's sensitivity to the cold, given sunshine, wind, and air temperature, swimming in 23.3°C (73.9°F) might be pleasant. Weather in January »
Weather in February
February is the month with the warmest seawater in Dee Why, Australia, with an average sea temperature of 23.7°C (74.7°F). Note: Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 23.7°C (74.7°F) water may be enjoyable. Weather in February »
Weather in March
In March, the average sea temperature in Dee Why, Australia, is 23.4°C (74.1°F). Note: If someone is sensitive to cold, the enjoyment of swimming in 23.4°C (74.1°F) water hinges on factors like sunshine, wind, and the current air temperature. Weather in March »
Weather in April
In Dee Why, Australia, the average seawater temperature in April is 22.8°C (73°F). Note: Individual preferences to cold, influenced by conditions such as sunshine, wind, and surrounding temperature, play a part in the comfort of swimming in 22.8°C (73°F) waters. Weather in April »
Weather in May
In May, the average sea temperature in Dee Why, Australia, is 20.8°C (69.4°F). Note: Swimming in water of 20.8°C (69.4°F) is not enjoyable for the majority of individuals. Weather in May »
Weather in June
In Dee Why, Australia, in June, the average water temperature is 19.3°C (66.7°F). Note: A majority do not enjoy swimming in water at 19.3°C (66.7°F). Weather in June »
Weather in July
In Dee Why, Australia, the average seawater temperature in July is 19.1°C (66.4°F). Note: Swimming is not a pleasant activity for most when the water temperature is 19.1°C (66.4°F). Weather in July »
Weather in August
In Dee Why, Australia, in August, the average water temperature is 18.8°C (65.8°F). Note: Swimming in 18.8°C (65.8°F) does not offer a pleasant experience for most individuals. Weather in August »
Weather in September
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. Weather in September »
Weather in October
In Dee Why, Australia, in October, the average water temperature is 19.3°C (66.7°F). Note: The majority of individuals find swimming in 19.3°C (66.7°F) to be unenjoyable. Weather in October »
Weather in November
In November, the average sea temperature in Dee Why, Australia, is 20.6°C (69.1°F). Note: Most people find swimming in 20.6°C (69.1°F) to be not enjoyable. Weather in November »
Weather in December
In Dee Why, Australia, the average seawater temperature in December is 21.9°C (71.4°F). Note: Most people do not find pleasure in swimming when the water temperature is 21.9°C (71.4°F). Weather in December »
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 month is the sea warmest in Dee Why?
With an average sea temperature of 23.7°C (74.7°F), February is the month with the warmest seawater in Dee Why.
When is Daylight Saving Time (DST) in Dee Why?
On Sunday, 07. April 2024, at 3:00 am, Daylight Saving Time ends, and the time zone changes from AEDT to AEST. The next Daylight Saving Time starts on Sunday, 06. October 2024, at 2:00 am, and the time zone reverts from AEST to AEDT.
What is the month with the shortest days in Dee Why?
June has the shortest days of the year, with an average of 9h and 54min of daylight.
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.
When are the longest days in Dee Why?
December has the longest days of the year, with an average of 14h and 24min of daylight.
Average sea temperature
Dee Why, Australia
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
Dee Why, Australia
- Average daylight in January:
14h and 1min - Average daylight in February:
13h and 2min - Average daylight in March:
12h and 2min - Average daylight in April:
11h and 2min - Average daylight in May:
10h and 2min - Average daylight in June:
9h and 5min
- Average daylight in July:
10h and 1min - Average daylight in August:
10h and 5min - Average daylight in September:
11h and 5min - Average daylight in October:
12h and 5min - Average daylight in November:
13h and 5min - 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).
