Rocky Bay Weather Forecast

    • 15
    • 25

    Windy. Clear

    • 18
    • 26

    Windy. Sunny

    • 19
    • 30

    Sunny

    • 22
    • 35

    Wind easing. Sunny

    • 24
    • 35

    Sunny

    • 21
    • 27

    Partly cloudy

    • 17
    • 24

    Becoming windy. Partly cloudy

Today 21 Dec Lower West

Sunny. Winds south to southeasterly 15 to 25 km/h tending south to southwesterly 25 to 35 km/h in the early afternoon then becoming southerly 15 to 20 km/h in the late evening.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Southerly 15 to 25 knots, reaching up to 30 knots in the evening.
Seas
Below 1 metre, increasing to 1.5 to 2 metres during the afternoon.
1st Swell
Southwesterly around 1 metre.
Weather
Sunny.
Weather Situation
A ridge persists over local waters. A weak front will brush the south coast on Monday, followed by the west coast trough returning by Tuesday.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Rocky Bay Temperature Statistics View More

December Temperature

Rottnest Island (2km)

  • Lowest 18 December, 2025

    16.5 °C

  • Average December

    21.4 °C

  • Highest 14 December, 2025

    37.1 °C

Climate (2020–Present)

Rottnest Island (2km)

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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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