SeaWorld is open: Sun - Sun 10:00 AM - 8:00 PM. Mon - Thu 10:00 AM - 6:00 PM. Fri - Fri 10:00 AM - 8:00 PM. Sat - Sat 10:00 AM - 9:00 PM. Buy tickets in advance on Tripadvisor. If you book with Tripadvisor, you can cancel at least 24 hours before the start date of your tour for a full refund.