Chelmsford, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Chelmsford, Massachusetts, United States, is known for the Bruce Freeman Rail Trail and the historic Chelmsford Center for the Arts. The best time to travel to Chelmsford, 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!