How much is admission to LEGOLAND Water Park? Admission to the LEGOLAND Water Park is $25.00 per adult/child/senior. Admission to LEGOLAND Water Park is available only with admission to LEGOLAND Florida. Was this article helpful? Related articles Can I purchase a ticket for LEGOLAND Water Park admission only? Can I purchase a Water Park only ticket? What are the ticket prices to LEGOLAND Florida Park? How much is admission to LEGOLAND Florida Park? How much does it cost to come back a second day with a Water Park Combo ticket?