Castle Bay Weather Forecast

    • 19
    • 28

    Partly cloudy

    • 17
    • 24

    Partly cloudy

    • 13
    • 25

    Partly cloudy

    • 16
    • 24

    Shower or two

    • 15
    • 23

    Partly cloudy

    • 12
    • 25

    Mostly sunny

    • 12
    • 30

    Sunny

Today 22 Jan South West

Mostly sunny. Slight chance of a shower near the south coast, near zero chance elsewhere. The chance of a thunderstorm in the east in the early afternoon. Light winds becoming north to northwesterly 15 to 20 km/h in the early morning then turning west to southwesterly 20 to 30 km/h during the morning. Daytime maximum temperatures 26 to 33.

Bunbury Geographe Coastal Waters

Dawesville to Cape Naturaliste
Wind
Variable about 10 knots becoming southwesterly 15 to 20 knots in the early morning.
Seas
Below 1 metre, increasing to 1 to 1.5 metres during the morning.
1st Swell
Southwesterly 1 to 1.5 metres.
Weather
Partly cloudy.
Weather Situation
A trough will move inland across the west coast today ahead of a weak cold front brushing the south coast on Friday. A weak ridge will then form in the southwest before another cold front approaches over the weekend.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Castle Bay Temperature Statistics View More

January Temperature

Cape Naturaliste (8km)

  • Lowest 18 January, 2026

    11.3 °C

  • Average January

    20.9 °C

  • Highest 20 January, 2026

    34 °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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