Almost every catamaran trip on Cozumel runs some version of the same route, and it is a good one. Boats leave the marinas and hotel docks on the west coast, head south with the island on their left, and stop at two or three of the shallow reefs the dive boats work — usually Palancar and Colombia — before finishing at El Cielo, the sand flat off the southwest tip where the water is waist-deep, absurdly clear, and scattered with cushion starfish. Three to five hours, gear included, music on, bar open somewhere around the second stop.
What varies enormously is the intent behind the boat. Some of these are snorkel tours that use a catamaran because it is a stable platform with a big swim deck and shade. Others are floating bars that stop at a reef for twenty minutes because the itinerary says so. Both are legitimate products and both sell well. Booking the second when you wanted the first is the most common disappointment in this category, and the listings do not always make the difference obvious. The tell is in the ordering: a trip that names the reefs first and the bar last is usually a snorkel trip. A trip that leads with "open bar", "dance floor" or "water slide" has told you what it is.
The word catamaran is doing some work here too. A handful of these boats genuinely sail. Most motor, because the run south and back on a schedule does not leave time to tack, and the twin hulls are there for deck space and stability rather than speed. That is not a scandal, but if you booked expecting sails up and the engine runs the whole way, at least you were warned.
For cruise passengers this is one of the best-fitting products on the island. A four-hour trip leaving around 9am is back by early afternoon with real margin against all-aboard, and the piers are close to the departure marinas. Just be careful with the afternoon departures: on a call that ends at 4pm, a 12:30 boat is cutting it finer than the listing suggests.
For anyone staying on the island, the sunset sail is the version worth booking. The west coast faces the channel and the mainland, the sun goes down over open water, and a 90-minute to two-hour evening trip out of San Miguel costs a fraction of a full-day charter. It is also the one catamaran trip where the bar being open is entirely the point.