Swan River - Mounts Bay Weather Forecast

    • 19
    • 37

    Mostly sunny

    • 24
    • 40

    Shower or two. Storm

    • 25
    • 34

    Possible afternoon storm

    • 20
    • 27

    Partly cloudy

    • 17
    • 28

    Cloud clearing

    • 17
    • 32

    Sunny

    • 17
    • 34

    Mostly sunny

Today 13 Dec Perth

Mostly sunny. The chance of a thunderstorm about the northern suburbs. Winds easterly 20 to 30 km/h increasing to 25 to 35 km/h in the late evening.

Melville Waters

Wind
Variable about 10 knots.
Weather
Sunny.
Weather Situation
A west coast trough will move offshore on Sunday and a weak low pressure system will develop within the trough, as a high pressure system strengthens in the Bight. The high will move east on Monday, allowing the trough to return to the west coast. The trough will move inland ahead of a cold front brushing the south coast on Tuesday. A new ridge will build across the southwest coast from Wednesday.
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  • Temperature Forecast Bureau of Meteorology

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Swan River - Mounts Bay Temperature Statistics View More

December Temperature

Perth Metro (6km)

  • Lowest 4 December, 2025

    14.6 °C

  • Average December

    22.4 °C

  • Highest 1 December, 2025

    39 °C

Climate (2020–Present)

Perth Metro (6km)

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  • Average Low 2020–2025

    13.4 °C

  • Average 2020–2025

    18.9 °C

  • Average High 2020–2025

    25.5 °C
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