Quantico, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Quantico, Maryland, United States, is known for the Quantico National Cemetery and its proximity to the Marine Corps Base Quantico. The best time to travel to Quantico, United States, is in late spring (May), when the average air temperature is around 70°F (21°C) and the water temperature in nearby bodies is approximately 65°F (18°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!