I was in Esperance windsurfing a few years ago now. From what I recollect the town centre is next to a big bay. Windsurfing there is basically open bay sailing so its a bit choppy but however no head high waves and big shore break. So take your windsurfing gear with you. I think probably in the morning before the wind picks up it would be okay for a beginner but I'm not 100% sure about that.