Castle Danger, United States offers 3 beaches perfect for sunbathing, surfing, swimming, and more. San Ildefonso, Central Luzon, Philippines, is known for the San Ildefonso Church and the historic Casa Real de San Ildefonso. The best time to travel to Castle Danger, United States, is in July when the average air temperature is around 70°F (21°C) and the water temperature in Lake Superior is approximately 55°F (13°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!