Castle Bay Weather Forecast

    • 18
    • 25

    Shower or two

    • 15
    • 23

    Morning shower or two

    • 13
    • 23

    Partly cloudy

    • 12
    • 28

    Sunny

    • 15
    • 30

    Sunny

    • 17
    • 29

    Sunny

    • 16
    • 30

    Cloud clearing

Today 25 Jan South West

Cloudy. High chance of showers, most likely during the morning and afternoon. Winds northwesterly 20 to 30 km/h tending westerly 25 to 35 km/h in the middle of the day then becoming light in the late evening. Daytime maximum temperatures in the low to mid 20s.

Bunbury Geographe Coastal Waters

Dawesville to Cape Naturaliste
Wind
Westerly 15 to 20 knots.
Seas
1 to 1.5 metres, decreasing to 1 metre around midday.
1st Swell
Southwesterly 2 to 3 metres, increasing to 2.5 to 4 metres during the afternoon.
Weather
Cloudy. 60% chance of showers.
Weather Situation
A trough in the Interior is moving west to the Goldfields and eastern Gascoyne, as a ridge weakens over southwest WA. A couple of weak cold fronts brush past the southwest and south coasts on Sunday and Monday, followed by a new ridge developing in the south. The trough over the Goldfields will move east and stall over the Interior as remnants of Tropical Cyclone Luana moves through the South Interior on Tuesday.
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 21 January, 2026

    35.6 °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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