Carnac Island Weather Forecast

    • 15
    • 20

    Clear

    • 13
    • 20

    Cloudy

    • 12
    • 23

    Mostly sunny

    • 13
    • 25

    Mostly sunny

    • 16
    • 29

    Mostly sunny

    • 17
    • 23

    Possible shower

    • 14
    • 21

    Showers

Today 12 Sep Perth

Clear. Light winds.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
West to northwesterly below 10 knots.
Seas
Below 0.5 metres.
1st Swell
West to southwesterly 2 to 3 metres.
Weather
Clear.
Weather Situation
A westerly flow will continue over local waters this weekend as a cold front brushes past the southwest coast on Sunday night. Winds turning easterly from Monday as a high develops in the Bight. A trough arrives on the west coast on Tuesday.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Carnac Island Temperature Statistics View More

September Temperature

Garden Island (13km)

  • Lowest 1 September, 2026

    10.2 °C

  • Average September

    15.7 °C

  • Highest 9 September, 2026

    21.8 °C

Climate (2021–2026)

Garden Island (13km)

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  • Average Low 2021–2026

    15.1 °C

  • Average 2021–2026

    18.9 °C

  • Average High 2021–2026

    23.3 °C
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