Topsail Beach, United States offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Topsail Beach is known for its serene beaches and family-friendly atmosphere. The best time to travel to Topsail Beach, United States, is from late spring to early fall (May to September), when the average air temperature ranges from 70°F to 85°F (21°C to 29°C) and the water temperature is typically between 70°F and 80°F (21°C to 27°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!