Devens, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Devens, Massachusetts, United States, is known for the Fort Devens Museum and its historical significance as a former military base. The best time to travel to Devens, United States, is in late spring (May to June) when the average air temperature is around 60-70°F, and water temperatures in nearby lakes are approximately 55-65°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!