Castle Bay Weather Forecast

    • 9
    • 19

    Cloudy

    • 12
    • 18

    Showers easing. Windy

    • 11
    • 17

    Shower or two

    • 8
    • 17

    Becoming cloudy

    • 8
    • 17

    Partly cloudy

    • 10
    • 19

    Possible shower

    • 12
    • 19

    Showers

Today 25 Jul South West

Partly cloudy. Slight chance of a shower near the Southwest Capes, most likely in the evening. Near zero chance of rain elsewhere. Winds north to northwesterly 20 to 30 km/h. Daytime maximum temperatures around 18.

Bunbury Geographe Coastal Waters

Dawesville to Cape Naturaliste
Wind
Northerly 15 to 20 knots turning northwesterly 15 to 25 knots in the late afternoon. Winds reaching up to 30 knots offshore in the late evening.
Seas
Around 1 metre, increasing to 1 to 1.5 metres during the afternoon.
1st Swell
Southwesterly 1 to 1.5 metres inshore, increasing to 1.5 to 2 metres offshore.
Weather
Partly cloudy.
Weather Situation
A high pressure system near the Eucla coast extends a ridge over southern WA. The high will slowly move east on Saturday ahead of a cold front which will cross the southwest of the state on Sunday. A new ridge will develop over southern WA from 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 22 July, 2026

    8.5 °C

  • Average July

    13.8 °C

  • Highest 15 July, 2026

    20.1 °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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