Carnac Island Weather Forecast

    • 12
    • 22

    Windy. Partly cloudy

    • 11
    • 18

    Shower or two

    • 13
    • 21

    Shower or two

    • 14
    • 20

    Showers

    • 13
    • 20

    Shower or two

    • 13
    • 19

    Showers

    • 11
    • 19

    Possible shower

Today 25 Sep Perth

Partly cloudy. Medium chance of showers. Winds southeasterly 25 to 35 km/h increasing to 25 to 40 km/h in the late evening.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Southeasterly 15 to 25 knots, reaching up to 30 knots during the afternoon and evening.
Seas
1 to 1.5 metres, increasing to 1.5 to 2.5 metres during the afternoon.
1st Swell
Southwesterly 2 to 3 metres.
Weather
Partly cloudy.
Weather Situation
A ridge extends across the southwest coast. An inland trough and low will move westwards on the weekend across southern and central WA, moving close to the west coast on Sunday. A high will develop south of the Bight on the weekend and move east for the following few days. On Monday the low will slip into the Bight and the trough will move east, ahead of the next cold front which will approach 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

    16.7 °C

  • Highest 16 September, 2026

    29.3 °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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