Sebastien Gael Adam (born March 28, 1986 in Beau Bassin) is a Mauritian swimmer who specializes in freestyle events. He represented his nation Mauritius at the 2008 Summer Olympics, placing himself among the top 60 swimmers in the 100 m freestyle. During his sporting career, Adam trained full-time at Brest Swimming Club in France.
Adam was invited by FINA to compete for Mauritius in the men's 100 m freestyle at the 2008 Summer Olympics in Beijing. Swimming in heat two, he chased Fiji's five-time Olympian Carl Probert on the final stretch to hit the wall in third place and fifty-seventh overall by a close, 0.02-second margin with a time of 52.35 seconds.