Castle Bay Weather Forecast

    • 14
    • 26

    Clear

    • 13
    • 29

    Sunny

    • 16
    • 28

    Becoming windy. Mostly sunny

    • 15
    • 27

    Cloud clearing

    • 13
    • 31

    Sunny

    • 17
    • 35

    Sunny

    • 23
    • 34

    Partly cloudy

Today 9 Dec South West

Partly cloudy. Winds southeasterly 20 to 30 km/h.

Bunbury Geographe Coastal Waters

Dawesville to Cape Naturaliste
Wind
Southerly 15 to 25 knots, reaching up to 30 knots offshore in the evening. Winds turning southeasterly 20 to 25 knots in the late evening.
Seas
1 to 1.5 metres, increasing to 1.5 to 2.5 metres during the afternoon.
1st Swell
Southwesterly 1 to 1.5 metres inshore, increasing to 1.5 to 2 metres offshore.
Weather
Sunny.
Weather Situation
A trough extending from the Gascoyne to the Goldfields will gradually move westwards across the South West Land Division to be located near the west coast by the weekend where it is expected to deepen. The trough will move offshore on Sunday as a high pressure system moves into the Bight and strengthens.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Castle Bay Temperature Statistics View More

December Temperature

Cape Naturaliste (8km)

  • Lowest 6 December, 2025

    12.8 °C

  • Average December

    19.2 °C

  • Highest 1 December, 2025

    32.1 °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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