Dee Why Beach Weather Forecast

    • 18
    • 29

    Sunny

    • 20
    • 34

    Sunny

    • 23
    • 36

    Possible shower

    • 20
    • 23

    Shower or two

    • 18
    • 24

    Cloudy

    • 20
    • 29

    Sunny

    • 20
    • 25

    Cloudy

Today 4 Dec Sydney

Sunny. Light winds becoming northwest to northeasterly 20 to 30 km/h in the middle of the day then becoming light in the late evening.

Sydney Coastal Waters

Broken Bay to Port Hacking
Wind
North to northeasterly 15 to 25 knots, reaching up to 30 knots in the evening.
Seas
1.5 metres, decreasing to 1 metre during the morning, then increasing to 1.5 to 2.5 metres during the afternoon.
1st Swell
Southerly below 1 metre.
Weather
Sunny.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Dee Why Beach Temperature Statistics View More

December Temperature

Terrey Hills (9km)

  • Lowest 3 December, 2025

    11.3 °C

  • Average December

    16.6 °C

  • Highest 1 December, 2025

    22.8 °C

Climate (2020–Present)

Terrey Hills (9km)

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  • Average Low 2020–2025

    13.4 °C

  • Average 2020–2025

    16.9 °C

  • Average High 2020–2025

    21.8 °C
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