So first off, this isn't really a true cenote in that it probably doesn't match what most people imagine a cenote is. The most popular ones are usually a cave formation with groundwater that you swim in. This place is kind of neither of those things, because it's an open-air lagoon. I'm not trying to quibble about what Webster's definition of "cenote" is - just that this is not what one is generally depicted as.
That said, this is an interesting place. You get the experience of snorkeling with fish that you get in most cenotes, along with the experience of basically swimming in the sea. There are a lot of interesting fish and the landscape is pretty cool.
However, this isn't just a place where you just leisurely swim around relax. Where you enter the lagoon is calm, but once you swim out into it at all, you WILL feel the current dragging you out to sea (obviously it depends a little on the time of year you're there). I had fins and I'm a capable swimmer, but I felt that it was really challenging battling the current back into the lagoon. Not to judge too much, but there aren't exactly a bunch of lifeguards on duty waiting to help you.
I'm not going to get too dramatic, because it's not like you're going to get swept out to sea if you're not careful. Although the lagoon has varying depths up to 20 feet, before it meets the Caribbean, there is a large area of shallow water where you can just simply put your feet down and you'll be fine. But then you kind of just have to stand there like an idiot to flag someone down to come get you.
The guy working there (who was friendly and spoke English) was pretty honest about the current and made it clear that, at a minimum, you had to have fins, and that a life vest was recommended. That adds up though - if you get all the gear plus a locker, it's going to be over $30 per person.
From what I understand, this place can get pretty crowded, and that if there are a lot of people there, the water can get a little murky. We went on a cloudy day during the off-season, and, although the water was nice, it was still relatively busy. read more