Neptune Beach, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Neptune Beach is known for its beautiful Atlantic Ocean coastline and the Beaches Town Center, a popular shopping and dining destination. The best time to travel to Neptune Beach, United States, is from March to May, with average air temperatures ranging from 65°F to 80°F and water temperatures around 70°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!