Barreiras, Brazil offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Barreiras, Alagoas, Brazil, is known for its proximity to the scenic Sao Francisco River and the historic city of Penedo. The best time to travel to Barreiras, Brazil, is from May to September, with average air temperatures around 25°C (77°F) and water temperatures near 24°C (75°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!