Lincoln, United States offers 7 beaches perfect for sunbathing, surfing, swimming, and more. Lincoln, Rhode Island, United States, is known for the historic Lincoln Woods State Park and the Twin River Casino. The best time to travel to Lincoln, United States, is in late spring (May), when the average air temperature is around 65°F (18°C) and water temperature is approximately 60°F (16°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!