Castle Bay Weather Forecast

    • 8
    • 18

    Cloudy

    • 9
    • 19

    Partly cloudy

    • 9
    • 21

    Mostly sunny

    • 13
    • 22

    Partly cloudy

    • 15
    • 21

    Showers

    • 14
    • 20

    Showers

    • 12
    • 19

    Showers

Today 23 May South West

Partly cloudy. Areas of frost in the north early this morning. Patchy fog early this morning. Slight chance of a shower near the south coast, near zero chance elsewhere. Light winds. Daytime maximum temperatures around 17.

Bunbury Geographe Coastal Waters

Dawesville to Cape Naturaliste
Wind
Variable about 10 knots.
Seas
Below 1 metre.
1st Swell
Southwesterly 1 to 1.5 metres inshore, increasing to 1.5 to 2.5 metres offshore.
Weather
Partly cloudy.
Weather Situation
A weak cold front sits over the southeast coast, as a new ridge is developing over the southwest coast of WA. This ridge is will remain over southern WA during the weekend.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Castle Bay Temperature Statistics View More

May Temperature

Cape Naturaliste (8km)

  • Lowest 5 May, 2026

    9.3 °C

  • Average May

    16 °C

  • Highest 12 May, 2026

    25.2 °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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