Grad Biograd na Moru, Croatia offers 9 beaches perfect for sunbathing, surfing, swimming, and more. Grad Biograd na Moru, Zadar, Croatia, is known for the Kornati National Park and the Biograd Boat Show. The best time to travel to Grad Biograd na Moru, Croatia, is from June to September, with average air temperatures around 75°F (24°C) and water temperatures around 73°F (23°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!