Armstrong Rock Weather Forecast

    • 13
    • 17

    Possible shower

    • 12
    • 18

    Shower or two

    • 13
    • 18

    Showers. Possible storm

    • 9
    • 14

    Showers. Windy

    • 9
    • 16

    Showers easing. Wind easing

    • 11
    • 16

    Showers

    • 11
    • 16

    Shower or two

Today 22 Aug Lower West

Partly cloudy. The chance of morning fog in the north. Medium chance of showers in the south, slight chance elsewhere. Light winds. Overnight temperatures falling to between 5 and 9 with daytime temperatures reaching between 17 and 20.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Variable below 10 knots.
Seas
Below 0.5 metres.
1st Swell
Southwesterly 2 to 3 metres.
Weather
Partly cloudy.
Weather Situation
A weak ridge nearby will move east today ahead of a trough forming near the west coast by Saturday. Associated cloud band will thicken over the area ahead of a cold front arriving on Sunday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Armstrong Rock Temperature Statistics View More

August Temperature

Rottnest Island (1km)

  • Lowest 4 August, 2025

    9.2 °C

  • Average August

    15.7 °C

  • Highest 13 August, 2025

    22.4 °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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