Swan River - Heirisson Island Weather Forecast

    • 23
    • 34

    Mostly sunny

    • 20
    • 31

    Partly cloudy

    • 19
    • 26

    Cloud clearing

    • 16
    • 33

    Sunny

    • 19
    • 34

    Sunny

    • 17
    • 29

    Partly cloudy

    • 15
    • 30

    Cloud clearing

Today 15 Dec Perth

Mostly sunny. The chance of a thunderstorm in the early afternoon. Winds north to northeasterly 20 to 30 km/h shifting westerly in the late morning and early afternoon.

Melville Waters

Wind
Northeasterly below 10 knots becoming westerly in the morning.
Weather
Mostly sunny. The chance of a thunderstorm in the early afternoon.
Weather Situation
A trough is deepening offshore from the west coast associated with a low pressure system. The trough will move back to the west coast throughout today, before moving inland ahead of a cold front brushing the south coast by Tuesday. A new ridge will build across the southwest coast from Wednesday.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Swan River - Heirisson Island Temperature Statistics View More

December Temperature

Perth Metro (5km)

  • Lowest 4 December, 2025

    14.6 °C

  • Average December

    23.4 °C

  • Highest 1 December, 2025

    39 °C

Climate (2020–Present)

Perth Metro (5km)

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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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