Cabo Polonio, Uruguay offers 1 beach perfect for sunbathing, surfing, swimming, and more. Cabo Polonio is known for its iconic lighthouse, expansive sand dunes, and the Cabo Polonio National Park. The best time to travel to Cabo Polonio, Uruguay, is from December 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!