The Basin Weather Forecast

    • 12
    • 18

    Sunny

    • 13
    • 18

    Sunny

    • 14
    • 20

    Shower or two

    • 14
    • 19

    Showers

    • 13
    • 18

    Possible shower

    • 12
    • 18

    Partly cloudy

    • 12
    • 19

    Mostly sunny

Today 7 Jul Lower West

Patchy morning fog. Sunny afternoon. Light winds. Daytime maximum temperatures around 20.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
East to southeasterly below 10 knots becoming southerly in the middle of the day then becoming east to southeasterly in the late evening.
Seas
Below 0.5 metres.
1st Swell
Southwesterly 2 to 3 metres.
Weather
Sunny.
Weather Situation
A ridge in the Southern Ocean is directing east to southeasterly winds over the local waters. Winds turn north to northwesterly on Wednesday ahead of a cold front which will pass south of the state, followed by low pressure system and an associated cold front which will intercept the west coast on Friday.
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 °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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