Porpoise Bay Weather Forecast

    • 12
    • 17

    Cloudy

    • 10
    • 16

    Partly cloudy

    • 10
    • 18

    Mostly sunny

    • 12
    • 19

    Possible shower developing

    • 14
    • 19

    Mostly sunny

    • 15
    • 19

    Showers. Windy

    • 13
    • 18

    Showers. Windy

Today 14 Aug Lower West

Partly cloudy. Winds south to southwesterly 15 to 20 km/h becoming light in the evening.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Southerly 10 to 15 knots tending southeasterly in the late evening.
Seas
Around 1 metre.
1st Swell
Westerly 2.5 to 3 metres.
Weather
Cloudy.
Weather Situation
A new ridge is developing over the area and will slip south over the weekend.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Porpoise Bay Temperature Statistics View More

August Temperature

Rottnest Island (3km)

  • Lowest 4 August, 2025

    9.2 °C

  • Average August

    15.9 °C

  • Highest 12 August, 2025

    21.3 °C

Climate (2020–Present)

Rottnest Island (3km)

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  • Average Low 2020–2025

    16.1 °C

  • Average 2020–2025

    19 °C

  • Average High 2020–2025

    22.8 °C
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