Opcina Sukosan, Croatia offers 7 beaches perfect for sunbathing, surfing, swimming, and more. Opcina Sukosan is known for Marina Dalmacija, the largest marina on the Adriatic coast. The best time to travel to Opcina Sukosan, Croatia, is from June to September, when the average air temperature is around 75°F (24°C) and the water temperature is approximately 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!