Joa, Brazil offers 1 beach perfect for sunbathing, surfing, swimming, and more. Joa, Rio de Janeiro, Brazil, is known for its stunning Joa Beach and the exclusive Joatinga neighborhood. The best time to travel to Joa, Brazil, is from December to March, with average air temperatures around 80°F (27°C) and water temperatures near 77°F (25°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!