The Basin Weather Forecast

    • 14
    • 18

    Shower or two

    • 12
    • 17

    Partly cloudy

    • 14
    • 19

    Possible shower

    • 15
    • 19

    Possible morning storm. Showers

    • 12
    • 18

    Shower or two. Wind easing

    • 12
    • 19

    Partly cloudy

    • 12
    • 20

    Sunny

Today 23 Aug Lower West

Partly cloudy. Medium chance of showers, most likely in the afternoon and early evening. Light winds becoming southwesterly 15 to 20 km/h in the middle of the day then becoming light in the evening. Daytime maximum temperatures around 19.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Variable below 10 knots becoming southwesterly 10 to 15 knots in the early afternoon then tending southerly in the evening.
Seas
Below 1 metre.
1st Swell
Southwesterly 1.5 to 2 metres.
Weather
Partly cloudy. 60% chance of showers.
Weather Situation
A weak cold front is crossing the southwest corner of the state today. A new ridge will extend across the area on Sunday night, moving east on Tuesday. Another cold front will move across the local waters on Wednesday.
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

    15.4 °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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