Fortin de Santa Rosa, Uruguay offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Fortin de Santa Rosa, Canelones, Uruguay, is known for its beautiful beaches and tranquil coastal atmosphere. The best time to travel to Fortin de Santa Rosa, Uruguay, is from December to February, 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!