Ross Edgley, 33, became the first man in history to circle Britain after 157 days of sailing.
The swimmer left Kent Town on June 1 and, clockwise, traveled 2,882 kilometers.
"I'll spend tonight in London, if there's a hotel with a pool, I'll probably have a bath", joked Edgley, the first person in history to complete this feat.
The athlete He swam up to twelve hours a day, including trips at night in which he had to deal with the waves, cold water currents and bad weather.
Edgley's odyssey has been compared to that of Matthew Webb in 1875 when he became the first person to cross the English Channel.
"At times it was pretty lonely, but getting there and seeing everyone is amazing, I'm very grateful."
Edgey entered the Guinness Book of Records on August 14, when he had been in this challenge for 74 days, for the longest swim in the sea.