Castle Bay Weather Forecast

    • 12
    • 17

    Possible shower

    • 11
    • 17

    Showers

    • 9
    • 17

    Showers increasing

    • 10
    • 17

    Shower or two

    • 9
    • 17

    Cloudy

    • 8
    • 17

    Mostly sunny

    • 11
    • 20

    Shower or two

Today 18 Jul South West

Partly cloudy. High chance of showers near the south coast, medium chance elsewhere. The chance of a thunderstorm near the south coast in the morning. Winds westerly 25 to 35 km/h decreasing to 15 to 25 km/h in the late afternoon then becoming west to northwesterly and light in the late evening. Daytime maximum temperatures around 16.

Bunbury Geographe Coastal Waters

Dawesville to Cape Naturaliste
Wind
Westerly 15 to 20 knots, reaching up to 25 knots offshore in the early afternoon.
Seas
1.5 to 2 metres, decreasing to 1 metre by early evening.
1st Swell
Westerly 4 to 5 metres.
Weather
Cloudy.
Weather Situation
AA weak ridge will slowly push over the central west coast over the weekend with a series of cold fronts moving along the south coast south of the ridge until early next week. The ridge will be pushed south and become established over southern parts from Tuesday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Castle Bay Temperature Statistics View More

July Temperature

Cape Naturaliste (8km)

  • Lowest 3 July, 2026

    8.7 °C

  • Average July

    14.2 °C

  • Highest 15 July, 2026

    20.1 °C

Climate (2021–2026)

Cape Naturaliste (8km)

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  • Average Low 2021–2026

    13.2 °C

  • Average 2021–2026

    17.2 °C

  • Average High 2021–2026

    22.7 °C
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