Castle Bay Weather Forecast

    • 9
    • 19

    Partly cloudy

    • 13
    • 19

    Showers

    • 11
    • 18

    Possible shower

    • 9
    • 19

    Mostly sunny

    • 10
    • 19

    Shower or two

    • 11
    • 19

    Showers

    • 10
    • 18

    Shower or two

Today 4 Jul South West

Partly cloudy. Slight chance of a shower near the Southwest Capes in the evening. Near zero chance of rain elsewhere. Light winds becoming north to northeasterly 15 to 20 km/h in the middle of the day. Daytime maximum temperatures between 15 and 18.

Bunbury Geographe Coastal Waters

Dawesville to Cape Naturaliste
Wind
Northeasterly 10 to 15 knots turning northerly 15 to 20 knots in the late morning.
Seas
Around 1 metre.
1st Swell
Southwesterly 1.5 to 2.5 metres.
Weather
Partly cloudy.
Weather Situation
A high pressure system in the Bight extends a ridge over the south coast. A cold front will cross the southwest of the state during Sunday afternoon and evening, rapidly weakening as it moves further inland on Monday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Castle Bay Temperature Statistics View More

July Temperature

Cape Naturaliste (8km)

  • Lowest 3 July, 2026

    8.7 °C

  • Average July

    12.2 °C

  • Highest 2 July, 2026

    17 °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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