Mar Grande, Brazil offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Mar Grande, Bahia, Brazil, is known for its proximity to the picturesque Itaparica Island and its beautiful beaches. The best time to travel to Mar Grande, Brazil, is from September to March, with average air temperatures around 80°F (27°C) and water temperatures near 79°F (26°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!