El Cielo
Cozumel is still Mexico's most popular diving and snorkeling destination. For good cause, the neighboring reefs are world-renowned. They boast year-round visibility and a stunning array of marine life, including spotted eagle rays, moray eels, groupers, barracudas, turtles, sharks, brain coral, and even massive sponges.
El Cielo Beach lives up to its heavenly name with shallow blue waters suitable for snorkeling and swimming amid starfish, stingrays, and other small, brilliant species. It's the ideal pit stop after a morning spent exploring the depths under the surface.
If diving is your primary goal, visit Cozumel in September or October when the weather is at its best. Book a tour with Aldora Divers, one of Cozumel's best dive businesses. When the weather on the western side of the island is terrible, they'll take you to the winward side of the island and conduct full-day excursions to caves with sleeping sharks.