if you can , cruise down to augusta on sat sun or monday its only an hour and a bit from bunno and it rocks in an easterly and the forecast looks awesome for the weekend.
if your really desperate , the only other good spots in bunbury are turkey pt ( not kite friendly lots of rocks and sharp things ) or theres koombana bay but in the SE'lys that are predicted it will be directly offshore any way so theres no point.
sorry mate its all bad news im afraid