Rockland, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Rockland is known for the Farnsworth Art Museum and the annual Maine Lobster Festival. The best time to travel to Rockland, United States, is during the summer months of June to August, when the average air temperature is around 70°F (21°C) and the 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!