Hi! It's my understanding that one of the two waterparks is always open. I believe Typhoon Lagoon is closing shortly (if it hasn't already) so I'd say Blizard Beach will be open around Christmastime. The Christmas decorations are put up at the end of November and are totally finished by Dec. 1st. Many of the special festivities for Christmas begin either very late November or Dec. 1st (Mickey's Very Merry Christmas Party begins Dec. 1st). I think they come down about a week after New Year's. Not sure of exact dates. Hope this helps!