Castle Bay Weather Forecast

    • 16
    • 31

    Sunny

    • 18
    • 31

    Sunny

    • 17
    • 25

    Partly cloudy

    • 13
    • 27

    Mostly sunny

    • 13
    • 31

    Sunny

    • 17
    • 34

    Sunny

    • 19
    • 31

    Sunny

Today 15 Jan South West

Sunny. Winds easterly 20 to 30 km/h turning south to southeasterly 15 to 25 km/h in the late morning and early afternoon then tending east to southeasterly in the late evening. Overnight temperatures falling to between 12 and 15 with daytime temperatures reaching 30 to 35.

Bunbury Geographe Coastal Waters

Dawesville to Cape Naturaliste
Wind
Easterly 15 to 20 knots turning southerly in the late morning.
Seas
1 to 1.5 metres, decreasing below 1 metre during the morning, then increasing to 1 to 1.5 metres by early evening.
1st Swell
Southwesterly around 1 metre inshore, increasing to 1 to 1.5 metres offshore.
Weather
Sunny.
Weather Situation
A west coast trough is deepening as a ridge over the southeast of the state moves away. The trough will move inland on Friday ahead of a weak cold front brushing past the south coast on Saturday. A new ridge will develop about southwest WA on 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 10 January, 2026

    13.1 °C

  • Average January

    20.4 °C

  • Highest 3 January, 2026

    32.6 °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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