Third Rocks Weather Forecast

    • 12
    • 21

    Clear

    • 14
    • 25

    Sunny

    • 17
    • 28

    Mostly sunny

    • 20
    • 23

    Mostly sunny

    • 17
    • 20

    Showers

    • 13
    • 18

    Showers easing

    • 15
    • 19

    Partly cloudy

Today 14 Sep Perth

Clear. Winds southeasterly 15 to 20 km/h increasing to 20 to 30 km/h in the late evening.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Southeasterly 15 to 20 knots.
Seas
Around 1 metre.
1st Swell
Southwesterly 2 to 2.5 metres.
Weather
Clear.
Weather Situation
A westerly flow initially before turning easterly during today as a high develops in the Bight. A trough arrives on the west coast on Tuesday. The trough will move back inland later Thursday ahead of another cold front that will move over local waters Friday morning.
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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 °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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