When is the quietest time to visit SEA LIFE Weymouth? We are generally quieter on off peak weekdays during school term time, but this can vary day to day. To guarantee you entry and receive priority admission, pre-book here. Related articles When does the SEA LIFE Express run? When is the Splash Zone and Pool open? When is SEA LIFE Weymouth open? Do my tickets include the Splash Zone? When is Pirate Adventure Golf open?