Castle Bay Weather Forecast

    • 11
    • 19

    Cloudy

    • 14
    • 20

    Showers

    • 11
    • 19

    Shower or two

    • 10
    • 19

    Mostly sunny

    • 9
    • 18

    Sunny

    • 10
    • 19

    Showers increasing

    • 11
    • 17

    Showers

Today 20 Jun South West

Partly cloudy. Slight chance of a shower near the Southwest Capes in the late afternoon and evening. Near zero chance of rain elsewhere. Winds northerly 15 to 20 km/h becoming light in the late afternoon then becoming northerly 15 to 20 km/h in the late evening. Daytime maximum temperatures around 16.

Bunbury Geographe Coastal Waters

Dawesville to Cape Naturaliste
Wind
Northeasterly 10 to 15 knots turning northerly 15 to 20 knots during the morning.
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 metres offshore.
Weather
Cloudy.
Weather Situation
A high pressure system over the South West Land Division will slowly move east over the weekend. A cold front will cross the South West Capes on Sunday morning, weakening as it moves inland during the day. A ridge will extend south of the state on Monday and Tuesday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Castle Bay Temperature Statistics View More

June Temperature

Cape Naturaliste (8km)

  • Lowest 15 June, 2026

    7.5 °C

  • Average June

    13.7 °C

  • Highest 7 June, 2026

    22.1 °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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