Neptune City, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Neptune City is known for its proximity to the Jersey Shore and the iconic Asbury Park Boardwalk. The best time to travel to Neptune City, United States, is during the summer months of June to August, when the average air temperature is around 75°F (24°C) and the ocean water temperature is approximately 70°F (21°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!