The Basin Weather Forecast

    • 14
    • 19

    Showers increasing

    • 15
    • 18

    Showers

    • 11
    • 17

    Mostly sunny

    • 12
    • 17

    Mostly sunny

    • 11
    • 17

    Sunny

    • 11
    • 19

    Sunny

    • 13
    • 20

    Sunny

Today 9 Jul Lower West

Mostly sunny. High chance of showers in the south, slight chance elsewhere, most likely from the late morning. Light winds. Daytime maximum temperatures between 19 and 22.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
North to northeasterly below 10 knots becoming northwesterly in the middle of the day then becoming west to southwesterly in the evening.
Seas
Below 1 metre.
1st Swell
West to southwesterly 1.5 to 2.5 metres.
Weather
Becoming cloudy. 80% chance of showers.
Weather Situation
A ridge is lying over the area and will move east ahead of a weak cold front moving to the south later today and into Friday. A new ridge develops along the south coast on Saturday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

The Basin Temperature Statistics View More

July Temperature

Rottnest Island (3km)

  • Lowest 1 July, 2026

    9.9 °C

  • Average July

    15.1 °C

  • Highest 5 July, 2026

    18.9 °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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