Third Rocks Weather Forecast

    • 11
    • 21

    Mostly sunny

    • 11
    • 22

    Sunny

    • 14
    • 20

    Showers. Becoming windy

    • 12
    • 17

    Shower or two

    • 13
    • 17

    Showers

    • 10
    • 17

    Shower or two

    • 9
    • 18

    Cloud clearing

Today 15 Aug Perth

Mostly sunny. Light winds.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Variable below 10 knots.
Seas
Below 1 metre.
1st Swell
Southwesterly 1.5 to 2 metres.
Weather
Sunny.
Weather Situation
A broad ridge of high pressure over southern WA will slowly move east this weekend. A cold front will move over the South West Land Division on Monday followed by a weak ridge which will extend over central parts of the state.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Third Rocks Temperature Statistics View More

August Temperature

Garden Island (8km)

  • Lowest 11 August, 2026

    7.7 °C

  • Average August

    14.2 °C

  • Highest 3 August, 2026

    21.2 °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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