Sorry, cannot help you with info for the stretch Ceduna to Esperance. I would say this time of the year and possibly up to end of March, with mainly Easterlies, it could be possible, however if a larger front with SW and S winds would come through, maybe not an area I would want to be in, on a 900 Nm lee-shore with very limited accuracy and availability in charts
However going clockwise further beyond Esperance (from your point of view), check out the link on Cruiserswiki in my bottomline. I also started to include details for the Bunbury area.
For more info, ask the questions here or via PM.
Either way, you will come past here, drop in and say hello!