Monte Caseros, Argentina offers 1 beach perfect for sunbathing, surfing, swimming, and more. Monte Caseros is known for its annual Carnival celebrations and the scenic Uruguay River. The best time to travel to Monte Caseros, Argentina, is from November to March, with average air temperatures around 25°C (77°F) and water temperatures near 22°C (72°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!