Martine Grael is a sailboat racer who has competed for Brazil.
She competed at the 2016 and 2020 Summer Olympic Games.
She is the daughter of six-time Olympian and five-time medalist Torben Grael. Her brother Marco Grael also sailed in the men's skiff class at Rio de Janeiro 2016, while her uncle Lars Grael won two bronze medals in the open multihull class.