Mushroom Rock Weather Forecast

    • 16
    • 27

    Becoming windy. Mostly sunny

    • 19
    • 26

    Becoming windy. Sunny

    • 18
    • 25

    Very windy. Cloud clearing

    • 15
    • 25

    Becoming windy. Sunny

    • 17
    • 27

    Windy. Sunny

    • 18
    • 28

    Sunny

    • 21
    • 30

    Sunny

Today 18 Dec Lower West

The chance of smoke haze in the morning. Sunny afternoon. Winds southeasterly 25 to 35 km/h. Daytime maximum temperatures around 30.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Southeasterly 15 to 20 knots tending southeast to southwesterly 15 to 25 knots in the morning then becoming southeasterly 15 to 20 knots in the late evening. Winds reaching up to 30 knots in the evening.
Seas
1 to 1.5 metres, decreasing to 1 metre during the morning, then increasing to 1 to 1.5 metres during the afternoon.
1st Swell
Southwesterly below 1 metre.
Weather
Sunny.
Weather Situation
A ridge extends across the southwest coast today. A west coast trough will form on Friday and move inland during the day, ahead of a new ridge developing on Saturday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Mushroom Rock Temperature Statistics View More

December Temperature

Rottnest Island (4km)

  • Lowest 4 December, 2025

    16.7 °C

  • Average December

    21.6 °C

  • Highest 14 December, 2025

    37.1 °C

Climate (2020–Present)

Rottnest Island (4km)

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  • Average Low 2020–2025

    16.1 °C

  • Average 2020–2025

    19 °C

  • Average High 2020–2025

    22.8 °C
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