Third Rocks Weather Forecast

    • 13
    • 20

    Partly cloudy

    • 11
    • 19

    Mostly sunny

    • 13
    • 20

    Partly cloudy

    • 11
    • 17

    Shower or two

    • 11
    • 19

    Showers

    • 14
    • 19

    Shower or two

    • 13
    • 19

    Shower or two

Today 23 Sep Perth

Partly cloudy. Medium chance of showers in the morning and early afternoon. Winds west to southwesterly 15 to 25 km/h becoming light in the evening.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Southwesterly about 10 knots.
Seas
Below 1 metre.
1st Swell
Southwesterly 1 to 2 metres, decreasing to 1 to 1.5 metres around midday.
Weather
Partly cloudy.
Weather Situation
A ridge sits over the local waters. A cold front will pass to the south on Thursday and a deep low pressure system developing inland on Friday will cause winds to freshen.
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

    16.8 °C

  • Highest 16 September, 2026

    29.3 °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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