When is Alton Towers Waterpark open? You can find our opening times for Alton Towers Waterpark here. Related articles What is included with my Waterpark Admission Ticket? Why am I being asked for a time slot when I book for Alton Towers Waterpark? What are the height restrictions in the Alton Towers Waterpark? Do you currently offer a Parent and Toddler Ticket for the Alton Towers Waterpark? Can I download a map of the Theme Park for Christmas?