Castle Bay Weather Forecast

    • 13
    • 18

    Possible shower

    • 8
    • 16

    Showers increasing

    • 10
    • 17

    Showers easing

    • 11
    • 19

    Showers increasing

    • 13
    • 19

    Shower or two

    • 11
    • 18

    Shower or two

    • 12
    • 18

    Showers

Today 12 Jul South West

Cloudy. Very high chance of showers, becoming less likely late this afternoon and evening. Possible small hail near the south coast during this evening. Winds west to northwesterly 15 to 20 km/h turning southwesterly during the morning and early afternoon. Daytime maximum temperatures between 13 and 17.

Bunbury Geographe Coastal Waters

Dawesville to Cape Naturaliste
Wind
West to southwesterly 15 to 20 knots turning southerly 10 to 15 knots during the afternoon and evening.
Seas
1 to 1.5 metres.
1st Swell
Southwesterly 2 to 3 metres inshore, increasing to 3 to 4 metres offshore.
Weather
Cloudy. 95% chance of showers.
Weather Situation
A cold front continues to track east today moving over the South West Land Division. A new ridge will extend over southwest WA on Sunday, followed by a weak cold front brushing the south coast on Sunday night and Monday.
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 8 July, 2025

    10 °C

  • Average July

    14.9 °C

  • Highest 1 July, 2025

    21.2 °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

    22.8 °C
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