 In 2005 , the Weymouth and Portland National Sailing Academy ( WPNSA ) was chosen as the venue for the sailing competition at the London 2012 Olympic and Paralympic games . WPNSA was chosen to host these events due to its existing World class facilities . The Olympic Delivery Authority has built upon these facilities providing a new <unk> slipway accessible at all states of tide and wind , an additional 70 marina berths and an extended dinghy park with capacity for 600 boats . In addition , the Academy provides direct access to Portland Harbour and Weymouth Bay which have been credited as some of the best sailing waters in the World . Olympic sailing events took place between 28 July and 11 August 2012 , and Paralympic events between 31 August and 5 September . One course was in Portland Harbour and four in Weymouth Bay . Sailors from all over the world competed for 30 medals in the Olympic Games and 18 medals in the Paralympic Games . A cruise liner berthed at Portland Port was used as accommodation . 
