Carnac Island Weather Forecast

    • 10
    • 18

    Possible morning shower

    • 8
    • 18

    Partly cloudy

    • 8
    • 20

    Partly cloudy

    • 10
    • 21

    Sunny

    • 11
    • 21

    Shower or two

    • 11
    • 18

    Shower or two

    • 9
    • 19

    Partly cloudy

Today 27 Jul Perth

Partly cloudy. Slight chance of a shower in the early morning. Light winds.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
South to southeasterly 10 to 15 knots decreasing to about 10 knots in the middle of the day.
Seas
Around 1 metre.
1st Swell
Southwesterly 2 to 3 metres, decreasing to 1.5 to 2 metres by early evening.
Weather
Partly cloudy. 60% chance of showers.
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  • Temperature Forecast Bureau of Meteorology

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Carnac Island Temperature Statistics View More

July Temperature

Garden Island (13km)

  • Lowest 8 July, 2026

    7 °C

  • Average July

    14.9 °C

  • Highest 15 July, 2026

    22.8 °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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