Holiday Shores, United States offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Holiday Shores, Illinois, United States, is known for its proximity to the scenic Horseshoe Lake State Park. The best time to travel to Holiday Shores, United States, is during late spring to early summer when the average air temperature is around 75°F (24°C) and the water temperature is approximately 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!