Grantsboro, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Grantsboro, North Carolina, United States, is known for its proximity to the scenic Neuse River and the nearby Croatan National Forest. The best time to travel to Grantsboro, United States, is in late spring (May), when the average air temperature is around 70°F (21°C) and the water temperature 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!