Rosario, Argentina offers 9 beaches perfect for sunbathing, surfing, swimming, and more. Rosario is known for its vibrant cultural scene and proximity to the Paraná River beaches. The best time to travel to Rosario, Argentina, is from November 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!