The Basin Weather Forecast

    • 15
    • 20

    Shower or two. Windy

    • 12
    • 17

    Partly cloudy

    • 13
    • 18

    Shower or two

    • 14
    • 19

    Showers. Becoming windy

    • 14
    • 18

    Shower or two. Wind easing

    • 14
    • 19

    Showers. Becoming windy

    • 12
    • 18

    Possible shower

Today 31 Aug Lower West

Cloudy. High chance of showers in the south, medium chance elsewhere. Winds westerly 15 to 20 km/h turning south to southwesterly in the evening.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
West to southwesterly 15 to 25 knots turning southerly 15 to 20 knots in the late evening.
Seas
Around 1 metre.
1st Swell
West to southwesterly 1.5 to 2 metres.
Weather
Cloudy. 70% chance of showers.
Weather Situation
A broad trough is moving through southern central WA as a cold front approaches the southwest corner of the state. A weak ridge will extend over the Lower West coast and push east in the wake of the cold front. Further weak cold fronts will move over southern districts on Wednesday and Thursday.
Graph Plots Open in Graphs

  • 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

    15.6 °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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