The Basin Weather Forecast

    • 12
    • 17

    Partly cloudy

    • 13
    • 18

    Shower or two

    • 13
    • 18

    Showers. Becoming windy

    • 14
    • 19

    Showers easing. Wind easing

    • 14
    • 19

    Showers

    • 12
    • 18

    Shower or two. Wind easing

    • 11
    • 18

    Mostly sunny

Today 1 Sep Lower West

Mostly clear. Light winds.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
South to southwesterly below 10 knots.
Seas
Below 0.5 metres.
1st Swell
West to southwesterly 1.5 to 2 metres.
Weather
Partly cloudy.
Weather Situation
A trough is moving eastwards through the Eucla and South Interior. A ridge has extended over the South West Land Division in the wake of the trough. Weak cold fronts will move over southern districts on Wednesday and Thursday, followed by a stronger front which will cross the South West Land Division during Saturday and Sunday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

The Basin Temperature Statistics View More

September Temperature

Rottnest Island (3km)

  • Lowest 1 September, 2026

    12.5 °C

  • Average September

    13.8 °C

  • Highest

    –

Climate (2021–2026)

Rottnest Island (3km)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    16.1 °C

  • Average 2021–2026

    18.9 °C

  • Average High 2021–2026

    22.8 °C
Get WillyWeather+ to remove ads