Not very wet, a squirt her & there. You can try & follow the directions the music gives & you'll hardly get a squirt.
March will probably be in the 70's but you know how Florida is, you can get 50's or 80's!!
There is potential to get very wet! But if they don't want to they can listen to the song and it'll tell them how to avoid the water.
FYI: If it's on the cool side when you go on the ride, the water effects will only work a little or not at all. My daughter was dissapointed because I rode with her and she wanted to squirt me!