Castle Bay Weather Forecast

    • 13
    • 22

    Sunny

    • 12
    • 22

    Sunny

    • 14
    • 23

    Sunny

    • 16
    • 24

    Mostly sunny

    • 15
    • 22

    Showers

    • 12
    • 20

    Showers

    • 11
    • 19

    Shower or two

Today 9 May South West

The chance of smoke haze in the morning. Sunny afternoon. Winds northeasterly 15 to 20 km/h becoming light in the early afternoon. Overnight temperatures falling to between 7 and 10 with daytime temperatures reaching the low 20s.

Bunbury Geographe Coastal Waters

Dawesville to Cape Naturaliste
Wind
Northeasterly 15 to 20 knots, reaching up to 25 knots offshore during the morning.
Seas
1 to 2 metres, decreasing to 1 to 1.5 metres during the afternoon.
1st Swell
Southwesterly around 1 metre inshore, increasing to 1 to 1.5 metres offshore.
Weather
Sunny.
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

    14.5 °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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