Carnac Island Weather Forecast

    • 7
    • 21

    Sunny day. Late shower or two

    • 11
    • 17

    Morning showers

    • 7
    • 19

    Sunny

    • 9
    • 21

    Mostly sunny

    • 11
    • 19

    Showers

    • 13
    • 19

    Showers

    • 11
    • 19

    Showers

Today 31 Jul Perth

Mostly sunny. Patches of morning frost about the hills. Patchy morning fog. High chance of showers about the southern suburbs, medium chance elsewhere. Light winds becoming west to northwesterly 15 to 20 km/h in the early afternoon then tending west to southwesterly in the late evening.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Northwest to northeasterly 10 to 15 knots tending west to northwesterly 15 to 20 knots in the early afternoon then tending west to southwesterly in the late evening.
Seas
Around 1 metre.
1st Swell
Southwesterly 1 to 1.5 metres, increasing to 1.5 to 2.5 metres during the morning.
Weather
Sunny day. 70% chance of showers in the late afternoon and evening.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Carnac Island Temperature Statistics View More

July Temperature

Garden Island (13km)

  • Lowest 8 July, 2026

    7 °C

  • Average July

    14.6 °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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