Machiasport, United States offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Machiasport is known for the Fort O'Brien State Historic Site and its proximity to the scenic Bold Coast. The best time to travel to Machiasport, United States, is during the summer months of July and 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!