Cathedral Rocks Weather Forecast

    • 15
    • 19

    Mostly sunny

    • 15
    • 19

    Sunny

    • 15
    • 19

    Mostly sunny

    • 15
    • 19

    Partly cloudy

    • 14
    • 19

    Possible shower

    • 13
    • 18

    Shower or two. Windy

    • 12
    • 19

    Shower or two. Wind easing

Today 20 Sep Lower West

Partly cloudy. Slight chance of a shower in the north, near zero chance elsewhere. Light winds.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
South to southwesterly below 10 knots.
Seas
Below 0.5 metres.
1st Swell
West to southwesterly 1.5 to 2.5 metres.
Weather
Mostly sunny.
Weather Situation
A ridge sits over the local waters, weakening Monday night and strengthening later Tuesday ahead of the next cold front on Thursday.
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

    16.7 °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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