Little Armstrong Bay Weather Forecast

    • 15
    • 19

    Cloudy

    • 14
    • 20

    Mostly sunny

    • 14
    • 23

    Sunny

    • 17
    • 23

    Sunny

    • 17
    • 21

    Possible shower

    • 15
    • 20

    Showers. Wind easing

    • 13
    • 19

    Shower or two

Today 13 Sep Lower West

Partly cloudy. Slight chance of a shower in the south, near zero chance elsewhere. Light winds becoming westerly 15 to 20 km/h in the morning then becoming light in the evening. Daytime maximum temperatures between 18 and 21.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Westerly 10 to 15 knots becoming southwesterly below 10 knots in the late evening.
Seas
Below 1 metre.
1st Swell
West to southwesterly 2 to 2.5 metres.
Weather
Cloudy.
Weather Situation
A westerly flow will continue over local waters this weekend as a cold front brushes past the southwest coast on Sunday night. Winds turning easterly from Monday as a high develops in the Bight. A trough arrives on the west coast 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 °C

  • Highest 11 September, 2026

    23.3 °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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