Swan River - Pier 21 Marina Weather Forecast

    • 22
    • 31

    Partly cloudy

    • 19
    • 28

    Partly cloudy

    • 19
    • 25

    Partly cloudy

    • 16
    • 30

    Sunny

    • 19
    • 30

    Sunny

    • 17
    • 26

    Becoming windy. Partly cloudy

    • 15
    • 27

    Cloud clearing

Today 15 Dec Perth

Mostly sunny. Slight chance of a shower. The chance of a thunderstorm in the early afternoon. Winds northeasterly 20 to 30 km/h shifting west to northwesterly in the late morning.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
North to northeasterly 10 to 15 knots becoming variable about 10 knots in the early morning.
Seas
Below 1 metre.
1st Swell
Southwesterly around 1 metre.
Weather
Sunny morning. The chance of a thunderstorm in the early afternoon.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Swan River - Pier 21 Marina Temperature Statistics View More

December Temperature

Swanbourne (8km)

  • Lowest 4 December, 2025

    14.6 °C

  • Average December

    22.4 °C

  • Highest 1 December, 2025

    38.4 °C

Climate (2020–Present)

Swanbourne (8km)

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  • Average Low 2020–2025

    14.5 °C

  • Average 2020–2025

    18.9 °C

  • Average High 2020–2025

    24.3 °C
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