Twin Rocks Weather Forecast

    • 12
    • 18

    Shower or two. Windy

    • 14
    • 19

    Shower or two

    • 15
    • 19

    Showers

    • 14
    • 18

    Shower or two

    • 14
    • 19

    Showers

    • 12
    • 18

    Shower or two

    • 12
    • 19

    Partly cloudy

Today 26 Sep Lower West

Cloudy. Medium chance of showers, becoming less likely late this afternoon and evening. The chance of a thunderstorm in the north. Winds southeasterly 30 to 45 km/h decreasing to 15 to 20 km/h in the late evening. Gusts to 80 km/h are possible about the hills and foothills in the morning. Daytime maximum temperatures between 15 and 20.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Southeasterly 15 to 25 knots, reaching up to 30 knots in the afternoon.
Seas
1.5 to 2.5 metres.
1st Swell
Southwesterly 2 to 3 metres, decreasing to 1.5 to 2 metres by early evening.
Weather
Cloudy. 50% chance of showers.
Weather Situation
A ridge is extending south of the state. An inland trough and low will move west on the weekend across southern and central WA, moving close to the west coast on Sunday. A high will develop south of the Bight on the weekend and move east for the following few days. On Monday the low will slip into the Bight and the trough will move east, ahead of the next cold front which will approach on Tuesday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Twin Rocks Temperature Statistics View More

September Temperature

Rottnest Island (5km)

  • Lowest 9 September, 2026

    11.5 °C

  • Average September

    16.7 °C

  • Highest 16 September, 2026

    27.8 °C

Climate (2021–2026)

Rottnest Island (5km)

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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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