Castle Bay Weather Forecast

    • 10
    • 16

    Partly cloudy

    • 12
    • 19

    Shower or two

    • 13
    • 20

    Possible shower

    • 11
    • 21

    Showers increasing. Windy

    • 10
    • 16

    Showers

    • 8
    • 16

    Cloudy

    • 8
    • 17

    Partly cloudy

Today 10 Aug South West

Partly cloudy. Slight chance of a shower near the south coast, near zero chance elsewhere. Light winds becoming northwesterly 15 to 20 km/h in the late evening.

Bunbury Geographe Coastal Waters

Dawesville to Cape Naturaliste
Wind
Westerly 10 to 15 knots, reaching up to 20 knots offshore in the late evening.
Seas
Below 1 metre.
1st Swell
West to southwesterly 2 to 3 metres inshore, increasing to 3 to 4 metres offshore.
Weather
Partly cloudy.
Weather Situation
A cold front over the Goldfields is moving east and will exit the state on Monday. A high following the cold front over southern WA moves into the Bight during Tuesday. The next cold front will approach the west coast on Wednesday and move through southern WA on Thursday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Castle Bay Temperature Statistics View More

August Temperature

Cape Naturaliste (8km)

  • Lowest 4 August, 2025

    8.3 °C

  • Average August

    14.3 °C

  • Highest 8 August, 2025

    19.3 °C

Climate (2020–Present)

Cape Naturaliste (8km)

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  • Average Low 2020–2025

    13.3 °C

  • Average 2020–2025

    17.2 °C

  • Average High 2020–2025

    22.7 °C
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