Little Armstrong Bay Weather Forecast

    • 15
    • 19

    Cloudy

    • 15
    • 19

    Mostly sunny

    • 15
    • 19

    Mostly sunny

    • 15
    • 19

    Cloud clearing

    • 14
    • 19

    Possible shower

    • 13
    • 18

    Shower or two. Windy

    • 12
    • 19

    Shower or two. Wind easing

Today 20 Sep Lower West

Cloudy morning, partly cloudy afternoon. Slight chance of a shower, becoming less likely in the afternoon. Light winds. Daytime maximum temperatures in the low 20s.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
South to southwesterly about 10 knots.
Seas
Below 1 metre.
1st Swell
West to southwesterly 1.5 to 2.5 metres.
Weather
Cloudy.
Weather Situation
A new ridge will develop today before weakening tomorrow. A second ridge is expected to begin strengthening again on Tuesday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Little Armstrong Bay Temperature Statistics View More

September Temperature

Rottnest Island (1km)

  • Lowest 9 September, 2026

    11.5 °C

  • Average September

    16.7 °C

  • Highest 16 September, 2026

    27.8 °C

Climate (2021–2026)

Rottnest Island (1km)

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  • Average Low 2021–2026

    16.1 °C

  • Average 2021–2026

    18.9 °C

  • Average High 2021–2026

    22.8 °C
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