Catherine Bay Weather Forecast

    • 14
    • 20

    Mostly sunny

    • 15
    • 20

    Rain. Windy

    • 13
    • 18

    Showers. Windy

    • 11
    • 16

    Shower or two

    • 11
    • 16

    Partly cloudy

    • 11
    • 17

    Sunny

    • 13
    • 17

    Shower or two

Today 18 Aug Lower West

Mostly sunny. Slight chance of a shower in the south, most likely in the early afternoon. Near zero chance of rain elsewhere. Winds northwest to northeasterly 15 to 25 km/h tending northwesterly in the middle of the day then tending northerly 15 to 20 km/h in the evening. Daytime maximum temperatures in the low to mid 20s.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
North to northeasterly 10 to 15 knots turning northwesterly 15 to 20 knots in the late morning.
Seas
Around 1 metre.
1st Swell
Southwesterly 1 to 1.5 metres, increasing to 1 to 2 metres during the morning.
Weather
Mostly sunny.
Weather Situation
A weak trough near the west coast will move east from Monday ahead of a cold front moving over the area on Tuesday. A southwesterly airstream will continue behind the front easing later Wednesday and Thursday as a ridge develops over the west coast.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Catherine Bay Temperature Statistics View More

August Temperature

Rottnest Island (1km)

  • Lowest 4 August, 2025

    9.2 °C

  • Average August

    15.5 °C

  • Highest 13 August, 2025

    22.4 °C

Climate (2020–Present)

Rottnest Island (1km)

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  • Average Low 2020–2025

    16.1 °C

  • Average 2020–2025

    19 °C

  • Average High 2020–2025

    22.8 °C
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