Sao Goncalo, Brazil offers 1 beach perfect for sunbathing, surfing, swimming, and more. Sao Goncalo is known for its proximity to the Guanabara Bay and the nearby city of Niteroi. The best time to travel to Sao Goncalo, 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!