Beira Mar, Brazil offers 1 beach perfect for sunbathing, surfing, swimming, and more. Beira Mar, Rio Grande do Sul, Brazil, is known for its beautiful beaches and vibrant coastal culture. The best time to travel to Beira Mar, Brazil, is from June to September, with average air temperatures around 77°F (25°C) and water temperatures near 79°F (26°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!