What are the Water Park opening and closing times? LEGOLAND California Water Park is now CLOSED for the season. For your convenience you can access a complete listing of our park hours HERE. Was this article helpful? Related articles When is LEGOLAND California Water Park open? When is LEGOLAND California open? What time is Early Access to the Park? Are there any restrictions on Swimwear at the Water Park? What is a Resort Hopper Ticket?