Castle Bay Weather Forecast
- 14
- 27
Sunny
- 15
- 26
Mostly sunny
- 14
- 27
Cloud clearing
- 15
- 25
Partly cloudy
- 15
- 26
Cloud clearing
- 15
- 23
Showers increasing
- 14
- 21
Shower or two
Today 12 Apr South West
Sunny. Light winds.
Bunbury Geographe Coastal Waters
Dawesville to Cape Naturaliste- Wind
- Southerly about 10 knots increasing to 10 to 15 knots in the late afternoon.
- Seas
- Below 1 metre.
- 1st Swell
- Southwesterly 1 to 1.5 metres inshore, increasing to 1.5 to 2 metres offshore.
- Weather
- Sunny.
- Weather Situation
- A ridge is extending over southern parts of the State while a west coast trough has moved onshore. A weak cold front will brush the southwest of the State overnight tonight with another ridge extending over western and southern Coastal Waters in its wake. The west coast trough will remain near the coast throughout the first half of the week.
Castle Bay Temperature Statistics View More
April Temperature
Cape Naturaliste (8km)
Lowest 7 April, 2026
11 °CAverage April
16.9 °CHighest 3 April, 2026
26.8 °C
Climate (2021–Present)
Cape Naturaliste (8km)
Average Low 2021–2026
13.3 °CAverage 2021–2026
17.2 °CAverage High 2021–2026
22.7 °C