Balneario Cidade Atlantica, Brazil offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Balneario Cidade Atlantica, Sao Paulo, Brazil, is known for its beautiful beaches and vibrant coastal attractions. The best time to travel to Balneario Cidade Atlantica, Brazil, is from April to September, with average air temperatures around 70-80°F (21-27°C) and water temperatures near 72-77°F (22-25°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!