The Basin Weather Forecast

    • 14
    • 19

    Possible shower

    • 15
    • 19

    Shower or two

    • 15
    • 19

    Mostly sunny

    • 15
    • 19

    Mostly sunny

    • 15
    • 19

    Cloud clearing

    • 14
    • 19

    Possible shower

    • 13
    • 19

    Shower or two. Becoming windy

Today 19 Sep Lower West

Cloudy. Medium chance of showers in the south, slight chance elsewhere. Winds westerly 15 to 20 km/h becoming light in the late evening.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Westerly 10 to 15 knots.
Seas
Around 1 metre.
1st Swell
West to southwesterly 3 to 4 metres.
Weather
Cloudy.
Weather Situation
A cold front moved across the local waters this morning, with a new ridge developing in it's wake. The ridge weakens Monday, and strengthens again on Tuesday.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

The Basin Temperature Statistics View More

September Temperature

Rottnest Island (3km)

  • Lowest 9 September, 2026

    11.5 °C

  • Average September

    16.7 °C

  • Highest 16 September, 2026

    27.8 °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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