Cathedral Rocks Weather Forecast

    • 11
    • 17

    Showers

    • 13
    • 16

    Possible morning storm. Windy

    • 10
    • 16

    Shower or two. Wind easing

    • 12
    • 17

    Mostly sunny

    • 12
    • 17

    Mostly sunny

    • 12
    • 19

    Mostly sunny

    • 13
    • 19

    Sunny

Today 9 Aug Lower West

Partly cloudy. High chance of showers in the west, medium chance elsewhere. Patches of frost in the north in the early morning. Light winds. Overnight temperatures falling to between 2 and 7 with daytime temperatures reaching around 16.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Southeast to southwesterly 15 to 20 knots becoming variable about 10 knots in the morning then becoming westerly 10 to 15 knots in the evening.
Seas
1 to 1.5 metres, decreasing below 1 metre during the morning.
1st Swell
Southwesterly 3 to 5 metres, decreasing to 2.5 to 3 metres by early evening.
Weather
Cloudy. 80% chance of showers.
Caution
Large and powerful surf conditions during this morning are expected to be hazardous for coastal activities such as swimming, surfing and rock fishing.
Weather Situation
A high pressure ridge to the north maintains a cold southwesterly flow over the area. Another cold front will move over the area on Monday, followed by another ridge on Tuesday and Wednesday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Cathedral Rocks Temperature Statistics View More

August Temperature

Rottnest Island (5km)

  • Lowest 8 August, 2026

    8.3 °C

  • Average August

    15.4 °C

  • Highest 3 August, 2026

    20.4 °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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