One waterpark should be open,in the cooler months they'll have one closed and refurbish the other one.As far as the weather there's been days where it gets as warm as the low to mid 80's and there's been days when the high is in the low to mid 50's with lows as much as near 30.If it gets that cold the one waterpark open will probably close down.More likely you'll have temperatures somewhere in the middle,the coldest I've ever been to a waterpark was with highs in the low to mid 70s sometime in March and for a Floridian like me it was actually kind of chilly especially when you weren't in the sun,but if you're coming from a colder place you'll be just fine with highs in the 70's,as they also keep the water warm.