Carnac Island Weather Forecast

    • 25
    • 41

    Partly cloudy

    • 20
    • 24

    Possible shower. Windy

    • 13
    • 24

    Becoming windy. Partly cloudy

    • 16
    • 27

    Becoming windy. Sunny

    • 16
    • 29

    Sunny

    • 15
    • 30

    Sunny

    • 18
    • 31

    Sunny

Today 25 Dec Perth

Partly cloudy. The chance of a thunderstorm with little or no rainfall. Winds northerly 20 to 30 km/h turning northwesterly 15 to 25 km/h in the late afternoon.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
West to northwesterly about 10 knots increasing to 10 to 15 knots in the late evening.
Seas
Below 1 metre.
1st Swell
Southwesterly around 1 metre.
Weather
Mostly sunny.
Weather Situation
An offshore trough is moving closer to the west coast. The trough will move inland this evening, ahead of a weak cold front brushing the south coast on Friday. A new ridge will develop along the southwest coast later Friday and expand east along the south coast on the weekend.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Carnac Island Temperature Statistics View More

December Temperature

Garden Island (13km)

  • Lowest 21 December, 2025

    13.9 °C

  • Average December

    21.9 °C

  • Highest 14 December, 2025

    38.8 °C

Climate (2020–Present)

Garden Island (13km)

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  • Average Low 2020–2025

    15.2 °C

  • Average 2020–2025

    18.9 °C

  • Average High 2020–2025

    23.4 °C
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