Castle Bay Weather Forecast

    • 14
    • 26

    Partly cloudy

    • 15
    • 26

    Sunny

    • 16
    • 24

    Partly cloudy

    • 15
    • 23

    Shower or two

    • 13
    • 23

    Cloudy

    • 13
    • 23

    Partly cloudy

    • 13
    • 22

    Shower or two

Today 2 Apr South West

Partly cloudy. Winds easterly 15 to 25 km/h turning southeasterly in the early afternoon. Daytime maximum temperatures in the low to mid 20s.

Bunbury Geographe Coastal Waters

Dawesville to Cape Naturaliste
Wind
Southeasterly 15 to 25 knots, reaching up to 30 knots offshore in the evening.
Seas
1 to 1.5 metres, decreasing to 1 metre around midday, then increasing to 1 to 1.5 metres by early evening.
1st Swell
Southwesterly 1 to 1.5 metres inshore, increasing to 1 to 2 metres offshore.
Weather
Partly cloudy.
Weather Situation
A high south of the State will move into the Bight today and Friday, with a ridge persisting through southern waters. A new trough will deepen from inland parts back towards the South West Capes on Friday before pushing inland later on Saturday. The northern end of a cold front may brush the lower west coast on Sunday.
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 1 April, 2026

    13.6 °C

  • Average April

    15.2 °C

  • Highest

    –

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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