Carnac Island Weather Forecast

    • 10
    • 21

    Sunny day. Showers increasing

    • 13
    • 19

    Showers easing

    • 11
    • 19

    Partly cloudy

    • 9
    • 19

    Shower or two

    • 12
    • 18

    Showers

    • 11
    • 17

    Showers easing

    • 8
    • 17

    Showers increasing

Today 3 Aug Perth

Sunny day. High chance of showers, most likely during this evening. The chance of a thunderstorm near the coast late this afternoon and evening. Winds east to northeasterly 15 to 25 km/h shifting northwesterly 15 to 20 km/h in the middle of the day.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
East to northeasterly 10 to 15 knots shifting northwesterly 15 to 20 knots in the middle of the day.
Seas
Below 1 metre.
1st Swell
Southwesterly 1.5 to 2 metres, decreasing to 1 to 1.5 metres during the afternoon.
Weather
Mostly sunny. 90% chance of showers. The chance of a thunderstorm late this afternoon and evening.
Weather Situation
A trough will approach today, before moving east on Tuesday, followed by a cold front along the southwest coast. A weak ridge will briefly return on Wednesday, before weakening on Thursday ahead of the next cold front.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Carnac Island Temperature Statistics View More

August Temperature

Garden Island (13km)

  • Lowest 2 August, 2026

    9.2 °C

  • Average August

    12.7 °C

  • Highest 1 August, 2026

    16.2 °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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