Islote Lobos National Park, Argentina offers 1 beach perfect for sunbathing, surfing, swimming, and more. Rio Negro, Argentina, is known for Islote Lobos National Park. The best time to visit Islote Lobos National Park in Argentina is from December to February, with average air temperatures around 70-80°F (21-27°C) and water temperatures around 60-70°F (16-21°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!