Castle Bay Weather Forecast

    • 15
    • 29

    Partly cloudy

    • 19
    • 25

    Rain

    • 16
    • 22

    Rain. Becoming windy

    • 16
    • 24

    Shower or two

    • 15
    • 21

    Showers

    • 15
    • 22

    Shower or two

    • 13
    • 22

    Partly cloudy

Today 26 Mar South West

Partly cloudy. Slight chance of a shower in the north in the afternoon and evening. Near zero chance of rain elsewhere. The chance of a thunderstorm in the afternoon and evening. Winds easterly 25 to 35 km/h decreasing to 15 to 25 km/h in the evening. Daytime maximum temperatures in the mid to high 20s.

Bunbury Geographe Coastal Waters

Dawesville to Cape Naturaliste
Wind
East to southeasterly 15 to 25 knots. Winds may reach up to 30 knots at times.
Seas
1.5 to 2.5 metres, decreasing below 1.5 metres around midday, then decreasing to 1 metre during the afternoon.
1st Swell
Southwesterly 1 to 2 metres, decreasing to 1 to 1.5 metres by early evening.
Weather
Partly cloudy. The chance of a thunderstorm in the afternoon and evening.
Weather Situation
A trough near the Gascoyne coast will shift offshore today before deepening whilst a ridge strengthens over central and southern WA. Meanwhile, a cloud band extends over southeastern parts of the state and is slowly moving east. Towards the weekend, Severe Tropical Cyclone Narelle will most likely approach the west coast from the north.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Castle Bay Temperature Statistics View More

March Temperature

Cape Naturaliste (8km)

  • Lowest 12 March, 2026

    12.2 °C

  • Average March

    20 °C

  • Highest 19 March, 2026

    32.7 °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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