Biscaia, Brazil offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Biscaia, Rio de Janeiro, Brazil, is known for its proximity to the beautiful beaches and vibrant culture of the larger Rio de Janeiro area. The best time to travel to Biscaia, 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!