Rio Negro, Chile offers 1 beach perfect for sunbathing, surfing, swimming, and more. Rio Negro, Los Lagos, Chile, is known for its proximity to the stunning Puyehue National Park. The best time to travel to Rio Negro, Chile, is during the summer months of December to February, when the average air temperature is around 68°F (20°C) and water temperature is approximately 59°F (15°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!