Sailing at the 2012 Summer Olympics in London was held 29 July – 11 August 2012 at Weymouth and Portland National Sailing Academy in Weymouth. The 2012 sailing program consisted of a total of ten events. Eleven fleet races were scheduled off the coast at Weymouth Bay for each event, except for the 49er and the Elliott 6m classes. For the 49er class, a total of 16 races were scheduled. Of the 11 (16) races, 10 (15) were scheduled as opening races and the last one as medal race. For the Elliott 6m a series of match races was scheduled. The sailing was done on different types of courses.

The 2012 Summer Olympics, officially the Games of the XXX Olympiad and also known as London 2012, were an international multi-sport event held from 27 July to 12 August 2012 in London, England, United Kingdom. The first event, the group stage in women's football, began on 25 July at the Millennium Stadium in Cardiff, Wales, followed by the opening ceremony on 27 July. There were 10,518 athletes from 206 National Olympic Committees (NOCs) who participated in the 2012 Olympics.