When is SEA LIFE Brighton open? Opening times at SEA LIFE Brighton vary throughout out the year. For our opening times, including last admission times, please click here. We advise 1.5 - 2 hours for your visit. Related articles Does SEA LIFE Brighton have a car park? How do I contact your Customer Services team? When are quieter times to visit SEA LIFE Brighton? If I arrive at last entry will I still have enough time to view the whole attraction? What is the Glass Bottom Boat Experience and how do I purchase tickets?