Castle Bay Weather Forecast

    • 15
    • 25

    Sunny

    • 12
    • 26

    Sunny

    • 15
    • 23

    Showers increasing

    • 14
    • 21

    Cloudy

    • 12
    • 21

    Cloudy

    • 13
    • 22

    Showers

    • 11
    • 19

    Showers easing

Today 15 Apr South West

Partly cloudy. Winds south to southeasterly 15 to 20 km/h becoming light in the late evening.

Bunbury Geographe Coastal Waters

Dawesville to Cape Naturaliste
Wind
Southerly 15 to 20 knots, reaching up to 25 knots offshore in the evening. Winds turning southeasterly in the late evening.
Seas
1 to 1.5 metres.
1st Swell
Southwesterly 2 to 2.5 metres.
Weather
Sunny.
Weather Situation
A weak cold front will continue moving eastwards through the Great Australian Bight tonight, a ridge developing over Southern Coastal Waters on Thursday. A west coast trough is slowly moving through central parts of the State ahead of the next cold front on Friday night. The cold front will weaken on Saturday as it moves east across the South West Land Division, and a new ridge will develop over southern and central parts in its wake.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Castle Bay Temperature Statistics View More

April Temperature

Cape Naturaliste (8km)

  • Lowest 7 April, 2026

    11 °C

  • Average April

    17.3 °C

  • Highest 3 April, 2026

    26.8 °C

Climate (2021–Present)

Cape Naturaliste (8km)

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  • Average Low 2021–2026

    13.3 °C

  • Average 2021–2026

    17.2 °C

  • Average High 2021–2026

    22.7 °C
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