Carnac Island Weather Forecast

    • 18
    • 26

    Becoming windy. Mostly sunny

    • 16
    • 28

    Partly cloudy

    • 15
    • 31

    Mostly sunny

    • 18
    • 32

    Sunny

    • 22
    • 31

    Mostly sunny

    • 19
    • 28

    Sunny

    • 18
    • 31

    Sunny

Today 8 Jan Perth

Mostly sunny. Winds southeasterly 15 to 20 km/h turning south to southwesterly 25 to 40 km/h in the morning.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Southerly 15 to 20 knots increasing to 20 to 25 knots in the middle of the day. Winds reaching up to 30 knots during the afternoon and evening.
Seas
Around 1 metre, increasing to 1.5 metres around midday, then increasing to 2 to 2.5 metres during the afternoon.
1st Swell
Southwesterly 1.5 to 2 metres, decreasing to 1 to 1.5 metres during the morning, then decreasing to around 1 metre during the afternoon.
Weather
Mostly sunny.
Weather Situation
A ridge about the south coast will weaken slightly today as a cold front passes well south of the State. Another ridge will strengthen thereafter and increase winds about local waters, a west coast trough developing over the weekend.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Carnac Island Temperature Statistics View More

January Temperature

Garden Island (13km)

  • Lowest 7 January, 2026

    18.5 °C

  • Average January

    23.2 °C

  • Highest 1 January, 2026

    31.8 °C

Climate (2021–Present)

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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