A body found by police off Bondi Beach has been formally identified as US student Endicott Ackerman, who was last seen jumping off rocks and into a post-storm swell on June 6.

Police say the body of the 20-year-old was retrieved from the ocean on Saturday morning, with dental records confirming on Wednesday it was the University of Sydney student, from Fairfax, Virginia.

His social media accounts include highlights of his football ­career at Robinson High School, from which he graduated in 2014.

Mr Ackerman is the third confirmed death in NSW as a result of the storms that lashed the state earlier this month.