Castle Bay Weather Forecast

    • 12
    • 22

    Sunny

    • 14
    • 23

    Windy. Mostly sunny

    • 17
    • 24

    Partly cloudy

    • 16
    • 23

    Showers

    • 12
    • 19

    Shower or two

    • 11
    • 19

    Showers easing

    • 11
    • 20

    Shower or two

Today 10 May South West

Sunny. Winds northeasterly 15 to 20 km/h tending northerly 15 to 25 km/h in the morning then becoming light in the late afternoon. Daytime maximum temperatures in the low 20s.

Bunbury Geographe Coastal Waters

Dawesville to Cape Naturaliste
Wind
Northerly 15 to 20 knots turning northeasterly 10 to 15 knots in the late evening.
Seas
1 to 1.5 metres, decreasing to 1 metre by early evening.
1st Swell
Southwesterly around 1 metre inshore, increasing to 1 to 1.5 metres offshore.
Weather
Sunny.
Weather Situation
A high pressure system will move slowly eastwards across the Great Australian Bight during the next few days. A cold front will approach the southwest coast on Wednesday.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Castle Bay Temperature Statistics View More

May Temperature

Cape Naturaliste (8km)

  • Lowest 5 May, 2026

    9.3 °C

  • Average May

    14.9 °C

  • Highest 7 May, 2026

    21.4 °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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