Little Armstrong Bay Weather Forecast

    • 14
    • 18

    Shower or two

    • 12
    • 17

    Partly cloudy

    • 13
    • 19

    Shower or two

    • 15
    • 19

    Possible morning storm. Showers

    • 12
    • 18

    Shower or two

    • 11
    • 19

    Mostly sunny

    • 12
    • 20

    Mostly sunny

Today 23 Aug Lower West

Partly cloudy. Medium chance of showers, most likely during this afternoon and early evening. Winds southerly 15 to 25 km/h tending southwesterly 15 to 20 km/h in the middle of the day then becoming light in the evening. Daytime maximum temperatures around 19.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Southerly 15 to 20 knots becoming variable below 10 knots in the middle of the day then becoming south to southwesterly 10 to 15 knots in the late afternoon.
Seas
1 to 1.5 metres, decreasing below 1 metre during the morning.
1st Swell
Southwesterly 1 to 2 metres.
Weather
Partly cloudy. 60% chance of showers.
Weather Situation
A weak cold front will cross the southwest corner of the state early Sunday, ahead of a ridge extending across the area on Sunday and Monday. Another cold front will move over the far southwest of the state on Tuesday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Little Armstrong Bay Temperature Statistics View More

August Temperature

Rottnest Island (1km)

  • Lowest 9 August, 2026

    7.4 °C

  • Average August

    15.4 °C

  • Highest 16 August, 2026

    23.2 °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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