Carnac Island Weather Forecast

    • 11
    • 19

    Rain

    • 10
    • 18

    Showers easing

    • 9
    • 20

    Partly cloudy

    • 10
    • 21

    Partly cloudy

    • 12
    • 23

    Sunny

    • 13
    • 21

    Shower or two

    • 11
    • 19

    Possible shower

Today 26 Aug Perth

Cloudy. Very high chance of rain, most likely in the afternoon and evening. The chance of a thunderstorm, possibly severe with heavy rain which may lead to flash flooding in the southwest in the morning and afternoon. Winds north to northwesterly 15 to 25 km/h shifting south to southeasterly 15 to 20 km/h during the afternoon and evening.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
North to northwesterly 15 to 20 knots shifting southerly in the afternoon.
Seas
Around 1 metre.
1st Swell
West to southwesterly 2 to 3 metres.
Weather
Cloudy. Near 100% chance of rain. The chance of a thunderstorm.
Weather Situation
Northwesterly winds this afternoon ahead of a slow-moving cold front approaching the southwest of the State. The front will pass through the local waters later on Wednesday, with a new ridge strengthening across the west coast on Thursday and Friday.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Carnac Island Temperature Statistics View More

August Temperature

Garden Island (13km)

  • Lowest 11 August, 2026

    7.7 °C

  • Average August

    15 °C

  • Highest 16 August, 2026

    23.7 °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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