Garden Island Weather Forecast

    • 17
    • 23

    Shower or two

    • 12
    • 19

    Cloudy

    • 13
    • 22

    Shower or two

    • 13
    • 25

    Cloud clearing

    • 13
    • 29

    Mostly sunny

    • 15
    • 29

    Becoming cloudy

    • 13
    • 20

    Possible shower

Today 21 Sep Illawarra

Becoming cloudy. High chance of showers, most likely during this afternoon and evening. The chance of a thunderstorm in the north this afternoon. Winds westerly 25 to 40 km/h shifting south to southeasterly 25 to 35 km/h during the morning. Daytime maximum temperatures 22 to 28.

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  • Temperature Forecast Bureau of Meteorology

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Garden Island Temperature Statistics View More

September Temperature

Nowra (RAN Air Station) (18km)

  • Lowest 17 September, 2026

    4.9 °C

  • Average September

    15.6 °C

  • Highest 5 September, 2026

    30.4 °C

Climate (2021–2026)

Nowra (RAN Air Station) (18km)

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  • Average Low 2021–2026

    12.1 °C

  • Average 2021–2026

    16.6 °C

  • Average High 2021–2026

    22.6 °C
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