Castle Bay Weather Forecast

    • 15
    • 32

    Sunny

    • 14
    • 31

    Sunny

    • 15
    • 32

    Sunny

    • 17
    • 33

    Sunny

    • 18
    • 29

    Cloud clearing

    • 15
    • 27

    Partly cloudy

    • 15
    • 21

    Possible shower

Today 4 Mar South West

Sunny. Winds east to southeasterly 15 to 20 km/h turning southerly in the late morning then tending southeasterly in the late evening. Daytime maximum temperatures 27 to 35.

Bunbury Geographe Coastal Waters

Dawesville to Cape Naturaliste
Wind
Southeasterly 15 to 20 knots turning southerly in the middle of the day. Winds reaching up to 25 knots offshore in the late evening.
Seas
Around 1 metre, increasing to 1 to 1.5 metres offshore.
1st Swell
Southwesterly 1 to 1.5 metres inshore, increasing to 1.5 to 2.5 metres offshore.
Weather
Sunny.
Weather Situation
A ridge of high pressure lies slow moving over southern and central parts of the state, while a deep trough extends down the west coast. The trough is expected to move inland over the weekend, ahead of a weak cold front moving through the Bight.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Castle Bay Temperature Statistics View More

March Temperature

Cape Naturaliste (8km)

  • Lowest 1 March, 2026

    12.3 °C

  • Average March

    17.4 °C

  • Highest 2 March, 2026

    24.4 °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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