Marmion Beach Weather Forecast

    • 15
    • 27

    Windy. Sunny

    • 14
    • 26

    Sunny

    • 17
    • 28

    Sunny

    • 18
    • 33

    Sunny

    • 21
    • 37

    Sunny

    • 24
    • 37

    Partly cloudy

    • 22
    • 28

    Partly cloudy

Today 20 Dec Perth

Sunny. Winds southeast to southwesterly 25 to 35 km/h becoming southeasterly 20 to 30 km/h in the evening.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Southerly 20 to 25 knots, reaching up to 30 knots during the afternoon and evening. Winds turning southeasterly 15 to 25 knots in the late evening.
Seas
1.5 metres, increasing to 2 to 2.5 metres during the afternoon.
1st Swell
Southwesterly below 1 metre.
Weather
Sunny.
Weather Situation
A ridge over local waters will strengthen tomorrow. A weak front will brush the south coast on Monday, followed by the west coast trough returning by Tuesday.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Marmion Beach Temperature Statistics View More

December Temperature

Swanbourne (13km)

  • Lowest 4 December, 2025

    14.6 °C

  • Average December

    22.5 °C

  • Highest 14 December, 2025

    41.1 °C

Climate (2020–Present)

Swanbourne (13km)

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  • Average Low 2020–2025

    14.6 °C

  • Average 2020–2025

    18.9 °C

  • Average High 2020–2025

    24.3 °C
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