Praia Azul, Brazil offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Praia Azul, Rio Grande do Sul, Brazil, is known for its beautiful beaches and the Lagoa dos Barros. The best time to travel to Praia Azul, Brazil, is from May to September, with average air temperatures around 75°F (24°C) and water temperatures near 72°F (22°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!