Armstrong Rock Weather Forecast

    • 13
    • 19

    Wind easing. Partly cloudy

    • 13
    • 19

    Mostly sunny

    • 15
    • 19

    Partly cloudy

    • 15
    • 19

    Shower or two. Becoming windy

    • 15
    • 19

    Partly cloudy

    • 14
    • 20

    Partly cloudy

    • 15
    • 20

    Sunny

Today 21 Oct Lower West

Partly cloudy. Slight chance of a shower in the morning. Winds southerly 15 to 20 km/h tending southwesterly 15 to 25 km/h in the middle of the day then becoming light in the evening. Daytime maximum temperatures around 20.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Southerly 15 to 20 knots.
Seas
1 to 1.5 metres, decreasing below 1 metre during the morning.
1st Swell
West to southwesterly 1 to 2 metres.
Weather
Mostly sunny.
Weather Situation
A ridge extends over Perth and Melville before a cold front approaches late Thursday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Armstrong Rock Temperature Statistics View More

October Temperature

Rottnest Island (1km)

  • Lowest 6 October, 2025

    11.5 °C

  • Average October

    16.7 °C

  • Highest 17 October, 2025

    24.7 °C

Climate (2020–Present)

Rottnest Island (1km)

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  • Average Low 2020–2025

    16.1 °C

  • Average 2020–2025

    18.9 °C

  • Average High 2020–2025

    22.8 °C
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