Castle Bay Weather Forecast

    • 8
    • 15

    Cloudy

    • 9
    • 18

    Showers increasing

    • 11
    • 16

    Showers. Windy

    • 7
    • 17

    Morning shower or two

    • 9
    • 19

    Partly cloudy

    • 7
    • 19

    Partly cloudy

    • 7
    • 19

    Sunny

Today 8 Aug South West

Partly cloudy. High chance of showers in the south, medium chance elsewhere. The chance of a thunderstorm near the coast in the afternoon. Possible small hail. Winds southwesterly 25 to 40 km/h decreasing to 20 to 30 km/h in the evening.

Bunbury Geographe Coastal Waters

Dawesville to Cape Naturaliste
Wind
South to southwesterly 20 to 30 knots.
Seas
2.5 to 3 metres.
1st Swell
Southwesterly 4 to 6 metres.
Weather
Cloudy. 70% chance of showers. The chance of a thunderstorm in the afternoon. Possible small hail in the afternoon and early evening.
Weather Situation
A vigorous and cold southwesterly flow extends east in the wake of a cold front moving over the central and eastern south coast today with a broad ridge extends over the the central west coast. The ridge will maintaining a cold southwesterly flow across southern WA on Sunday. Another cold front will move through southwest WA on Monday, followed by another ridge on Tuesday and Wednesday.
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  • Temperature Forecast Bureau of Meteorology

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Castle Bay Temperature Statistics View More

August Temperature

Cape Naturaliste (8km)

  • Lowest 2 August, 2026

    6 °C

  • Average August

    13.2 °C

  • Highest 3 August, 2026

    21.6 °C

Climate (2021–2026)

Cape Naturaliste (8km)

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  • Average Low 2021–2026

    13.2 °C

  • Average 2021–2026

    17.2 °C

  • Average High 2021–2026

    22.7 °C
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