Third Rocks Weather Forecast

    • 10
    • 17

    Partly cloudy

    • 9
    • 17

    Partly cloudy

    • 9
    • 17

    Sunny

    • 9
    • 18

    Sunny

    • 10
    • 18

    Shower or two

    • 10
    • 16

    Shower or two

    • 10
    • 17

    Partly cloudy

Today 21 Jul Perth

Partly cloudy. Slight chance of a shower about the northern suburbs, becoming less likely early this evening. Near zero chance of rain elsewhere. Light winds.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
South to southeasterly about 10 knots increasing to 10 to 15 knots in the early afternoon.
Seas
Below 1 metre.
1st Swell
Southwesterly 1 to 2 metres.
Weather
Partly cloudy.
Weather Situation
A ridge is beginning to develop to the south today and will strengthen and move east during the week.
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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