Southport, United States offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Southport, Maine, United States, is known for the Hendricks Head Lighthouse and the scenic views of the Maine coastline. The best time to travel to Southport, United States, is from April to June, with average air temperatures ranging from 65°F to 85°F and water temperatures around 70°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!