Dee Why Weather Forecast

    • 19
    • 26

    Sunny morning. Shower or two

    • 15
    • 18

    Shower or two

    • 16
    • 21

    Shower or two

    • 17
    • 22

    Mostly sunny

    • 16
    • 24

    Sunny

    • 17
    • 26

    Possible shower developing

    • 16
    • 20

    Shower or two

Today 21 Sep Sydney

Sunny morning. Medium chance of showers in the afternoon and evening. The chance of a thunderstorm in the outer west in the afternoon. Winds north to northwesterly 15 to 25 km/h shifting south to southeasterly 25 to 40 km/h during the morning.

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Dee Why Temperature Statistics View More

September Temperature

Terrey Hills (8km)

  • Lowest 10 September, 2026

    8.1 °C

  • Average September

    16.3 °C

  • Highest 5 September, 2026

    30.8 °C

Climate (2021–2026)

Terrey Hills (8km)

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  • Average Low 2021–2026

    13.6 °C

  • Average 2021–2026

    17.1 °C

  • Average High 2021–2026

    22 °C
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