Cancun

[jasondbaker]

You won't find much diving around Cancun. Yeah you can dive there, but it won't compare to Coz. I think it would be okay for a day. I did this dive about 6 years ago.

You might want to check out Scubaboard for dive operators. They have a Mexico travel section on their forum. Someone may have a recent recommendation for Cancun.

Another option to check out depending on your dive experience is the cenotes (caverns). You should have good bouyancy skills before doing these dives. The cenotes are the best dives in that area.

You could rent a car for a day and drive down to Playa del Carmen and jump on a dive boat crossing over to Coz. That makes for a pretty expensive day trip but the diving would be significantly better than Cancun.