A South African man has become the first person to cross the Atlantic Ocean on a stand-up paddleboard after completing an epic 4,050-mile voyage alone at sea.

Chris Bertish pulled into Antigua, in the Leeward islands of the Caribbean, at 8.32am local time (12.32pm GMT) Thursday after departing from Agadir, Morocco, 93 days ago, said SUP the Mag.

In his last "captain's log" posted on Facebook and written roughly an hour before he completed his nautical expedition, Bertish said: "A day I have been working toward for as long as I can remember … I've put everything on the line for this project for the last five years … everything!"

Bertish, 42, a big-wave surfer as well as sailor, who won the renowned Mavericks surf contest in northern California in 2010, had contended with sharks, storms and loneliness on the adventure.