Catherine Bay Weather Forecast

    • 19
    • 26

    Windy. Sunny

    • 18
    • 26

    Very windy. Cloud clearing

    • 15
    • 25

    Windy. Sunny

    • 17
    • 26

    Windy. Sunny

    • 19
    • 27

    Sunny

    • 22
    • 31

    Sunny

    • 23
    • 31

    Mostly sunny

Today 19 Dec Lower West

Mostly sunny. The chance of a thunderstorm in the north. Winds south to southeasterly 15 to 25 km/h tending south to southwesterly 25 to 40 km/h in the early afternoon.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
South to southwesterly 15 to 25 knots, reaching up to 30 knots in the late evening.
Seas
Around 1 metre, 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 move inland on Saturday, followed by a strengthening ridge. Another 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

Catherine Bay Temperature Statistics View More

December Temperature

Rottnest Island (1km)

  • Lowest 18 December, 2025

    16.5 °C

  • Average December

    21.4 °C

  • Highest 14 December, 2025

    37.1 °C

Climate (2020–Present)

Rottnest Island (1km)

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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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