Armstrong Rock Weather Forecast

    • 11
    • 21

    Sunny

    • 12
    • 21

    Sunny

    • 14
    • 21

    Mostly sunny

    • 16
    • 20

    Showers easing

    • 15
    • 19

    Shower or two

    • 13
    • 20

    Cloud clearing

    • 13
    • 21

    Sunny

Today 9 Sep Lower West

Mostly sunny. Winds easterly 20 to 30 km/h decreasing to 15 to 20 km/h in the evening.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Easterly 10 to 15 knots.
Seas
Below 1 metre.
1st Swell
Southwesterly 1.5 to 2 metres.
Weather
Sunny.
Weather Situation
A high in the Bight is directing east to northeasterly winds across the local waters. Winds tend northwesterly ahead of a weak cold front crossing the southern districts on Saturday, with another weak cold front late Sunday.
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  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Armstrong Rock Temperature Statistics View More

September Temperature

Rottnest Island (1km)

  • Lowest 7 September, 2026

    12.1 °C

  • Average September

    15.3 °C

  • Highest 4 September, 2026

    19 °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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