How far in advance do SEA LIFE birthday parties need to be booked? Our birthday parties are very popular and the birthday rooms get reserved quickly. To avoid disappointment we recommend you reserve the special date you want as soon as possible but at least 2 weeks in advance. To book, please call 760-438-5346. Was this article helpful? Related articles What are the Terms & Conditions for the free admission to LEGOLAND on your Birthday in 2019? Do you offer a birthday party package at SEA LIFE California? Will there be a host for my SEA LIFE party? How long can we stay in SEA LIFE California Aquarium? What is included in the Express Birthday Party Package?