Monsuaba, Brazil offers 1 beach perfect for sunbathing, surfing, swimming, and more. Monsuaba, Rio de Janeiro, Brazil, is known for its proximity to the beautiful Ilha Grande and the stunning beaches of Angra dos Reis. The best time to travel to Monsuaba, Brazil, is from May to September, with average air temperatures around 70-80°F (21-27°C) and water temperatures near 70-75°F (21-24°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!