Typhoon Lagoon reopened from it's yearly renovation the beginning of March. Each of the water parks close for 2 to 3 months during the winter for renovations. Last year, Blizzard Beach was closed from November through mid December, and Typhoon Lagoon was closed from mid December through the beginning of March so they could complete the new attraction "Slusher Gusher". Unless you are going during the winter, you won't have to worry about either of the 2 water parks being closed, unless they are closed to capacity.