Kai Lenny is a surf enthusiast, stand-up surfer and racer, surfer, surfer, windsurfier, kite surfer, surfer and water sports enthusiast. Lenny lives in Maui. Lenny gained recognition in 2012 with first place at Hawaii Island Finals SUP pro and first place at Sunset Beach SUP pro. Kai Lenny won the world championship title SUP by winning the season final of the first World Series Championship Standup race held at Turtle Bay Resort, O'ahu, Hawaii from 13 to 14 May. September 2012. In February 2020, Lenny won the Nazaré Tow Surf Challenge, in Praia do Norte, Portugal. The competition takes place in big waves and has the participation of the best big wave riders in the world. He is also known for his great beach cleanups in Hawaii.
In 2012, he became the world champion in stand-up paddle (SUP).