Third Rocks Weather Forecast

    • 15
    • 19

    Cloudy

    • 12
    • 21

    Partly cloudy

    • 14
    • 24

    Mostly sunny

    • 17
    • 28

    Sunny

    • 19
    • 23

    Possible shower

    • 15
    • 19

    Showers

    • 14
    • 19

    Possible shower

Today 13 Sep Perth

Partly cloudy. Slight chance of a shower in the southwest, near zero chance elsewhere. Light winds becoming westerly 15 to 20 km/h in the morning then becoming light in the evening.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Westerly 10 to 15 knots becoming southwesterly below 10 knots in the late evening.
Seas
Below 1 metre.
1st Swell
West to southwesterly 2 to 2.5 metres.
Weather
Cloudy.
Weather Situation
A westerly flow will continue over local waters this weekend as a cold front brushes past the southwest coast on Sunday night. Winds turning easterly from Monday as a high develops in the Bight. A trough arrives on the west coast on Tuesday.
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  • 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

    16.1 °C

  • Highest 11 September, 2026

    25 °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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