Dee Why
Australia
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Dee Why, Australia

In January, the average sea temperature in Dee Why, Australia, is 23.3°C (73.9°F). Note: For individuals prone to feeling cold, swimming in 23°C (73.4°F) is still regarded as intolerable. Weather in January »

The month with the warmest seawater in Dee Why, Australia, is February, with an average sea temperature of 23.7°C (74.7°F). Note: A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 23.7°C (74.7°F) water. Weather in February »

In March, the average sea temperature in Dee Why, Australia, is 23.4°C (74.1°F). Note: A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 23.4°C (74.1°F) water. Weather in March »

In Dee Why, Australia, the average seawater temperature in April is 22.8°C (73°F). Note: A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 22.8°C (73°F) water. Weather in April »

In Dee Why, Australia, in May, the average water temperature is 20.8°C (69.4°F). Note: For most, swimming in 20.8°C (69.4°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). Weather in May »

In June, the average sea temperature in Dee Why, Australia, is 19.3°C (66.7°F). Note: For swimming, a surface water temperature of 19.3°C (66.7°F) is not enjoyable for the majority. Weather in June »

In Dee Why, Australia, in July, the average water temperature is 19.1°C (66.4°F). Note: Swimming in 19.1°C (66.4°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F). Weather in July »

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) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F). Weather in August »

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: For swimming, a surface water temperature of 18.6°C (65.5°F) is not enjoyable for the majority. Weather in September »

In Dee Why, Australia, in October, the average water temperature is 19.3°C (66.7°F). Note: For swimming, a surface water temperature of 19.3°C (66.7°F) is not enjoyable for the majority. Weather in October »

In Dee Why, Australia, in November, the average water temperature is 20.6°C (69.1°F). Note: For swimming, a surface water temperature of 20.6°C (69.1°F) is not enjoyable for the majority. Weather in November »

In Dee Why, Australia, in December, the average water temperature is 21.9°C (71.4°F). Note: For most, swimming in 21.9°C (71.4°F) is not an enjoyable activity. Weather in December »

What is the month with the warmest sea water in Dee Why?

The month with the warmest seawater is February, with an average sea temperature of 23.7°C (74.7°F).

What is the month with the shortest days in Dee Why?

June has the shortest days of the year in Dee Why, Australia, with an average of 9.9h of daylight.

What is the month with the coldest sea water in Dee Why?

With an average sea temperature of 18.6°C (65.5°F), September is the month with the coldest seawater.

When are the longest days in Dee Why?

The month with the longest days is December, with an average of 14.4h 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

The month with the longest days is December (Average daylight: 14.4h).
The month with shortest days is June (Average daylight: 9.9h).