Arauco, Chile offers 8 beaches perfect for sunbathing, surfing, swimming, and more. Arauco is known for its proximity to the Nahuelbuta National Park and the Arauco Gulf. The best time to travel to Arauco, Chile, is during the summer months of December to February, when the average air temperature is around 68°F (20°C) and the water temperature is approximately 63°F (17°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!