That date of August is largely a guess. We really do not know how long we will be here. That is one of the perks of being retired. I think this is the third time we have been to this island. The first time was March 2011, squeezing in some Mexican sunshine during Spring break from teaching in Del Rio. This place has really changed since that first visit.
Here are some photos from this most recent visit. All of these were taken the last three or four days. As we flew into Cozumel we past over the Carnival Valor, pictured below.
There is a lot more that can be shown of this city and the island also. But hopefully this gives you an idea if you want to try it out if you get the chance. It has become more touristy in the eleven year period between our first and last visit, more expensive. Public transport is, like in many parts of Mexico, co-opted by taxis. But maybe that is a non-issue for you. And for us it still would not keep us from coming back a fourth time.