Third Rocks Weather Forecast

    • 9
    • 17

    Partly cloudy

    • 10
    • 17

    Shower or two

    • 8
    • 17

    Partly cloudy

    • 9
    • 17

    Sunny

    • 9
    • 18

    Sunny

    • 10
    • 19

    Possible shower developing

    • 13
    • 19

    Shower or two

Today 20 Jul Perth

Mostly clear. Slight chance of a shower in the southwest, near zero chance elsewhere. Light winds.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Southwesterly below 10 knots.
Seas
Below 1 metre.
1st Swell
Southwesterly 1 to 2 metres.
Weather
Partly cloudy.
Weather Situation
A ridge is developing over the area with a weak cold front moving along the south coast south of the ridge later Monday into Tuesday. The ridge will then move south and strengthen in the wake of the cold front.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Third Rocks Temperature Statistics View More

July Temperature

Garden Island (8km)

  • Lowest 8 July, 2026

    7 °C

  • Average July

    14.9 °C

  • Highest 15 July, 2026

    22.8 °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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