Mersey Point Weather Forecast

    • 18
    • 31

    Sunny

    • 17
    • 29

    Cloud clearing

    • 14
    • 28

    Sunny

    • 16
    • 30

    Sunny

    • 17
    • 33

    Sunny

    • 21
    • 36

    Sunny

    • 25
    • 36

    Mostly sunny

Today 19 Dec Perth

Sunny. Winds easterly 30 to 45 km/h decreasing to 20 to 30 km/h in the morning then shifting southwesterly 25 to 35 km/h in the middle of the day.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Southeasterly 15 to 20 knots turning south to southwesterly 15 to 25 knots in the middle of the day. Winds reaching up to 30 knots in the late evening.
Seas
1 to 1.5 metres, decreasing to 1 metre during the morning, then increasing to 1.5 to 2 metres during the afternoon.
1st Swell
Southwesterly below 1 metre.
Weather
Sunny.
Weather Situation
A west coast trough will form today and move inland during the day, ahead of a new ridge developing on Saturday.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Mersey Point Temperature Statistics View More

December Temperature

Garden Island (7km)

  • Lowest 4 December, 2025

    16.4 °C

  • Average December

    21.9 °C

  • Highest 14 December, 2025

    38.8 °C

Climate (2020–Present)

Garden Island (7km)

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  • Average Low 2020–2025

    15.2 °C

  • Average 2020–2025

    19 °C

  • Average High 2020–2025

    23.4 °C
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