Porpoise Bay Weather Forecast

    • 15
    • 19

    Mostly sunny

    • 14
    • 19

    Partly cloudy

    • 13
    • 19

    Becoming windy. Partly cloudy

    • 11
    • 17

    Shower or two. Wind easing

    • 12
    • 19

    Showers

    • 15
    • 19

    Shower or two

    • 14
    • 19

    Shower or two

Today 23 Sep Lower West

Sunny. Winds southwesterly 15 to 20 km/h becoming light in the evening.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Southwesterly about 10 knots.
Seas
Below 1 metre.
1st Swell
Southwesterly 1 to 1.5 metres.
Weather
Mostly sunny.
Weather Situation
A cold front will pass south of the area on Thursday. A ridge will extend across the west coast behind this front as a low pressure centre and trough start to develop over southern WA from late Friday, resulting in a freshening of winds over the Perth Local Waters.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Porpoise Bay Temperature Statistics View More

September Temperature

Rottnest Island (3km)

  • Lowest 9 September, 2026

    11.5 °C

  • Average September

    16.7 °C

  • Highest 16 September, 2026

    27.8 °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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