Castle Bay Weather Forecast
- 8
- 21
Clear
- 11
- 21
Sunny
- 13
- 21
Showers increasing
- 10
- 18
Cloudy
- 11
- 19
Shower or two
- 11
- 19
Showers
- 10
- 17
Shower or two
Today 29 Aug South West
Partly cloudy. Light winds.
Bunbury Geographe Coastal Waters
Dawesville to Cape Naturaliste- Wind
- Southeasterly 10 to 15 knots.
- Seas
- Below 1 metre.
- 1st Swell
- Southwesterly 1 to 2 metres inshore, increasing to 2 to 3 metres offshore.
- Weather
- Mostly clear.
- Weather Situation
- A trough extending from the Gascoyne, across Goldfields to the Esperance region is moving westwards as an easterly flow develops due to a high pressure system establishing in the Bight. Associated cloud band will linger across inland southern WA through the weekend. Winds turning warmer northeasterly on Sunday as the westward moving trough nears the west coast. A cold front will move through the southwest of the state later Monday, pushing the west coast trough inland again. Another weak front will brush past the south coast middle of next week.
Castle Bay Temperature Statistics View More
August Temperature
Cape Naturaliste (8km)
Lowest 2 August, 2026
6 °CAverage August
13.5 °CHighest 3 August, 2026
21.6 °C
Climate (2021–2026)
Cape Naturaliste (8km)
Average Low 2021–2026
13.2 °CAverage 2021–2026
17.2 °CAverage High 2021–2026
22.7 °C