The Basin Weather Forecast

    • 15
    • 20

    Sunny day. Late shower or two

    • 13
    • 17

    Showers easing

    • 10
    • 18

    Sunny

    • 13
    • 19

    Shower or two

    • 15
    • 19

    Showers easing

    • 15
    • 17

    Showers easing

    • 14
    • 19

    Showers

Today 31 Jul Lower West

Mostly sunny. High chance of showers in the south, slight chance elsewhere. Patchy fog early this morning, mainly inland. Light winds becoming north to northwesterly 15 to 20 km/h in the middle of the day then tending west to northwesterly in the early afternoon. Daytime maximum temperatures in the low 20s.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Northerly 10 to 15 knots shifting southwesterly 15 to 20 knots in the late evening.
Seas
Around 1 metre.
1st Swell
Southwesterly 1.5 to 2.5 metres.
Weather
Sunny day. 70% chance of showers in the late afternoon and evening.
Weather Situation
A ridge over local waters is slowly weakening. A weak cold front will move through this evening, followed by a new ridge over the weekend. A trough will develop along the west coast on Monday in association with a cloud band.
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  • 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

    15.4 °C

  • Highest 15 July, 2026

    21.8 °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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