Diamante, Argentina offers 7 beaches perfect for sunbathing, surfing, swimming, and more. Diamante is known for the Parque Nacional Pre-Delta and the Festival Nacional de Jineteada y Folklore. The best time to travel to Diamante, Argentina, is from November to March, with average air temperatures around 75°F (24°C) and water temperatures near 70°F (21°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!