Marco Soffiatti Grael (born June 9, 1989) is a Brazilian sailor. He competes in the 49er class alongside Gabriel Borges, finishing 11th at the 2016 Summer Olympics, 16th in the 2020 Summer Olympics. Both also won the gold at the 2019 Pan American Games. He is the son of Olympic champion Torben Grael, and brother of Martine Grael.