I am only aware of one weather station in Mandurah - that's the BOM one previously mentioned at the marina.
Station Details ID: 009977 Name: MANDURAH Lat: -32.52 Lon: 115.71 Height: 3.0 m
Yes it's a lousy location and under reads the wind speed when it isn't from the E, N, NW, or dead south up the estuary. The direction is roughly correct once the wind is established but the seabreeze will hit the coast before it shows up at the marina, and the wind direction tends to be affected by being funnelled from the south through the adjacent river mouth. Well that's what I reckon anyway. Local wind does vary around Mandurah as you go south of north so the variation isn't always an error.
I believe all live Mandurah reading on all sites come from this same BOM station.
www.bom.gov.au/products/IDW60801/IDW60801.94605.shtml Modelled predictions on individual sites may vary.
Does anyone know of any other actual weather stations in Mandurah that could provide live readings?