Malvin, Uruguay offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Malvin, Montevideo, Uruguay, is known for its beautiful beaches and the iconic Malvin Beach. The best time to travel to Malvin, Uruguay, is from December to March, 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!