Third Rocks Weather Forecast

    • 14
    • 22

    Mostly sunny

    • 17
    • 19

    Morning showers

    • 14
    • 19

    Cloudy

    • 12
    • 22

    Partly cloudy

    • 15
    • 25

    Partly cloudy

    • 17
    • 27

    Sunny

    • 16
    • 22

    Shower or two

Today 11 Sep Perth

Mostly sunny. Winds northeasterly 15 to 20 km/h turning northwesterly in the middle of the day.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Northeasterly 10 to 15 knots turning northwesterly 15 to 20 knots in the middle of the day.
Seas
Around 1 metre.
1st Swell
Southwesterly 1 to 1.5 metres, increasing to 1.5 to 2 metres during the morning.
Weather
Mostly sunny.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Third Rocks Temperature Statistics View More

September Temperature

Garden Island (8km)

  • Lowest 1 September, 2026

    10.2 °C

  • Average September

    15.5 °C

  • Highest 9 September, 2026

    21.8 °C

Climate (2021–2026)

Garden Island (8km)

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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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