Third Rocks Weather Forecast

    • 12
    • 20

    Sunny

    • 12
    • 19

    Sunny

    • 13
    • 20

    Shower or two

    • 12
    • 20

    Possible shower

    • 13
    • 18

    Shower or two

    • 12
    • 17

    Shower or two

    • 12
    • 18

    Shower or two

Today 21 Sep Perth

Sunny. Winds west to southwesterly 15 to 20 km/h turning southerly 15 to 25 km/h in the late afternoon.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Southerly about 10 knots increasing to 10 to 15 knots in the early afternoon.
Seas
Below 0.5 metres, increasing to around 1 metre during the afternoon.
1st Swell
Southwesterly 1.5 to 2.5 metres.
Weather
Sunny.
Weather Situation
A ridge sits over the local waters, weakening tonight and strengthening late Tuesday ahead of the next cold front on Thursday.
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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