When is the quietest time to visit LEGOLAND California? The park is quieter when schools are in session, generally from late August to late February, excluding days close to major holidays. Was this article helpful? Related articles Can I take a backpack into LEGOLAND? How will the park verify if visitors have been vaccinated? Will I have to queue to get into LEGOLAND California? Can I leave and re-enter the park on the same day? What events do you have coming up at LEGOLAND California?