Entering from the cave, it will be shallow (depending on the tide) then gradually deeper. Off the ladder, I'm guessing about 8 feet or so (but this is only a guess). If it were me, I wouldn't go in barefoot. Sea urchins, etc could present a painful problem. I would recommend either water shoes or snorkel gear. Xtabi is truly a nice place to snorkel and the rooms on the garden side are really reasonable. Rockhouse is also a great, easy place to snorkel or enter the water just to swim. However, it is more $$$. It all depends on how much you want to spend. Either way, I have no doubt you guys are going to have a ball. Enjoy!!!