Third Rocks Weather Forecast

    • 12
    • 20

    Sunny

    • 13
    • 20

    Possible shower

    • 12
    • 19

    Partly cloudy

    • 13
    • 19

    Partly cloudy

    • 11
    • 18

    Possible shower

    • 11
    • 19

    Possible shower

    • 13
    • 18

    Partly cloudy

Today 22 Sep Perth

Mostly sunny. The chance of fog early this morning, mainly about the hills. Light winds becoming southwesterly 15 to 20 km/h in the middle of the day then becoming light in the evening.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
South to southwesterly 10 to 15 knots decreasing to about 10 knots in the morning.
Seas
Below 1 metre.
1st Swell
Southwesterly 1.5 to 2.5 metres.
Weather
Mostly 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

    16.7 °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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