Cathedral Rocks Weather Forecast

    • 18
    • 22

    Partly cloudy

    • 16
    • 21

    Showers increasing

    • 14
    • 19

    Showers easing. Windy

    • 15
    • 19

    Possible morning shower

    • 14
    • 20

    Sunny

    • 15
    • 19

    Shower or two

    • 14
    • 19

    Mostly sunny

Today 17 Sep Lower West

Mostly sunny. Slight chance of a shower inland in the afternoon. Near zero chance of rain elsewhere. Winds northwest to northeasterly 20 to 30 km/h tending west to northwesterly 15 to 25 km/h in the early afternoon then becoming light in the evening. Daytime maximum temperatures around 30.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
North to northwesterly 10 to 15 knots decreasing to about 10 knots in the late afternoon.
Seas
Below 1 metre.
1st Swell
Southwesterly 1 to 1.5 metres.
Weather
Mostly sunny.
Weather Situation
A trough extends down the west coast. From Thursday, the trough will become mobile and move inland, ahead of a cold front crossing the local waters on Friday before the next ridge begins to develop.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Cathedral Rocks Temperature Statistics View More

September Temperature

Rottnest Island (5km)

  • Lowest 9 September, 2026

    11.5 °C

  • Average September

    16.3 °C

  • Highest 11 September, 2026

    23.3 °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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