Oakham, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Oakham, Massachusetts, United States, is known for its proximity to the scenic Quabbin Reservoir. The best time to travel to Oakham, United States, is in late spring (May), when the average air temperature is around 65°F (18°C) and water temperature in nearby lakes is approximately 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!