I really dont think you need to be able to swim really. Most slides end in a pool no deeper than 3 or 4 feet. Which means, you can simply stand up. If your still abit awry, only ride those fast dropper(the big one which goes straight down). The end is like maybe 1 foot deep. When in doubt, ask the lifeguard who is working the pool and see how deep it is before riding the ride.