Catherine Bay Weather Forecast

    • 10
    • 16

    Showers. Wind easing

    • 12
    • 17

    Showers

    • 13
    • 17

    Showers. Possible storm

    • 9
    • 14

    Showers. Wind easing

    • 9
    • 15

    Cloudy

    • 10
    • 16

    Shower or two

    • 11
    • 17

    Showers. Windy

Today 21 Jul Lower West

Partly cloudy. High chance of showers near the coast, medium chance elsewhere. Patches of frost inland in the early morning. Winds southeast to southwesterly 15 to 20 km/h tending west to southwesterly in the morning then becoming light in the early afternoon. Overnight temperatures falling to between 2 and 5 with daytime temperatures reaching between 12 and 15.

Perth Local Waters

Two Rocks to Dawesville, inshore from Rottnest Island
Wind
Southerly 15 to 25 knots, reaching up to 30 knots early in the morning. Winds tending east to southeasterly 10 to 15 knots in the early morning then tending south to southwesterly in the middle of the day.
Seas
2 to 3 metres, decreasing to 1 metre during the morning.
1st Swell
Southwesterly 2 to 3 metres.
Weather
Cloudy. 80% chance of showers. A thunderstorm likely in the early morning.
Caution
Large and powerful surf conditions in the morning are expected to be hazardous for coastal activities such as swimming, surfing and rock fishing.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Catherine Bay Temperature Statistics View More

July Temperature

Rottnest Island (1km)

  • Lowest 8 July, 2025

    11.2 °C

  • Average July

    15.7 °C

  • Highest 6 July, 2025

    21.7 °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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