The Basin Weather Forecast

    • 12
    • 20

    Clear

    • 14
    • 20

    Mostly sunny

    • 15
    • 20

    Showers increasing

    • 13
    • 17

    Partly cloudy

    • 13
    • 17

    Cloudy

    • 14
    • 19

    Showers

    • 13
    • 17

    Shower or two

Today 29 Aug Lower West

Clear. Winds east to southeasterly 15 to 20 km/h.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Southeasterly 10 to 15 knots decreasing to about 10 knots in the late evening.
Seas
Below 1 metre.
1st Swell
Southwesterly 1 to 1.5 metres.
Weather
Clear.
Weather Situation
A ridge has become established the south. A trough will move close to the west coast on Sunday, before moving inland again ahead of a cold front sweeping through local waters later Monday. Another weak front will brush past the south coast middle of next week.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

The Basin Temperature Statistics View More

August Temperature

Rottnest Island (3km)

  • Lowest 9 August, 2026

    7.4 °C

  • Average August

    15.4 °C

  • Highest 16 August, 2026

    23.2 °C

Climate (2021–2026)

Rottnest Island (3km)

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  • Average Low 2021–2026

    16.1 °C

  • Average 2021–2026

    18.9 °C

  • Average High 2021–2026

    22.8 °C
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