There are other places to shore dive that are just as good as out by El Cid - the strip between Park Royal and Blue Angel, for instance. Nothing you can get to from shore is going to approach what you can see from a boat, of course.Might be too late, too - the only "shore diving" I know of in Cozumel is at the El Cid La Ceiba (the Airplane site, although it got moved and banged up in the big hurricane) and down at Chankanaab; diving at Chankanaab is shallow and very easy.