Dee Why Beach Weather Forecast

    • 9
    • 18

    Possible shower

    • 13
    • 17

    Showers

    • 11
    • 19

    Mostly sunny

    • 12
    • 17

    Partly cloudy

    • 9
    • 16

    Mostly sunny

    • 9
    • 16

    Shower or two

    • 10
    • 16

    Shower or two

Today 13 Aug Sydney

Partly cloudy. The chance of morning fog in the outer west. Slight chance of a shower in the late afternoon and evening. Light winds.

Sydney Coastal Waters

Broken Bay to Port Hacking
Wind
West to southwesterly below 10 knots becoming southerly in the late afternoon then increasing to 10 to 15 knots in the evening. Winds reaching up to 20 knots inshore in the late evening.
Seas
Below 1 metre.
1st Swell
Southeasterly 1 to 1.5 metres, tending southerly below 1 metre by early evening.
Weather
Partly cloudy. 70% chance of showers. The chance of a thunderstorm offshore.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Dee Why Beach Temperature Statistics View More

August Temperature

Terrey Hills (9km)

  • Lowest 12 August, 2025

    6.5 °C

  • Average August

    11.8 °C

  • Highest 5 August, 2025

    20.6 °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

    21.7 °C
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