I was OW certified dry and it wasn't a problem at allother than the wrist seal /dry cuff failing and swimming around for 20 minutes in the Puget Sound.Talk to your instructor see what he/she thinks.Ultimatley its up to your instructor any way.Definatley take the class, trial and error training is no way to learn in this sport .You may dive more often if you have a drysuit. I do just to ju$tify the purcha$e.