The record-breaking 33-year-old, who raised £1,000 for Sports Aid when he swam the Molokai Straits in June, pushed his way through the pain barrier to finish the energy-sapping 21-mile swim of the Catalina Channel off the east coast of USA in an impressive 12 hours and 15 minutes.
Speaking after the swim, delighted Adam said: “It was very tough. It took me to the edge of my limits but failing was not an option for me. The worst part of the swim was how I was consistently sick from the disorientation in the dark.
“My left shoulder was also getting so sore it meant I was basically swimming with one arm for the last four hours.
“Conditions were very foggy so I couldn’t see the finish point until I was 150 yards away.”
Adventurous Adam has already swum the English Channel, the Strait of Gibraltar and Hawaii’s treacherous Molokai Straits, which made him the first British person to do so.
He now needs to swim Japan’s Tsugaru Strait, the Cook Strait in New Zealand and the Irish Channel to become the first British swimmer in history to complete the Ocean 7 Challenge.
Adam currently works for white goods manufacturer Indesit as the firms national account manager.