DIVE CONDITIONS From 75 degrees in winter to 85 in summer; strong currents are a signature; drift diving is the norm.
WHAT TO WEAR Many divers are fine in a bathing suit or boardshorts; for repetitive diving, a 3 to 5 mm wetsuit should suffice.
TRAVEL TIP Fly in to Cancun, catch the bus to Playa del Carmen, and take a ferry to Coz. Rent a car at the ferry terminal; Coz is an easy place for drivers to navigate, and a car allows you to explore the island.
WHEN TO GO Year-round; trip insurance is a good idea during hurricane season.