Bar Harbor, United States offers 9 beaches perfect for sunbathing, surfing, swimming, and more. Bar Harbor is known for Acadia National Park and the scenic views of Frenchman Bay. The best time to travel to Bar Harbor is from June to August, with average air temperatures around 70°F (21°C) and water temperatures near 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!