Adriai tenger, Croatia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Zadar is known for the Sea Organ and the Greeting to the Sun. The best time to travel to the Adriatic Sea in Croatia is from June to September, with average air temperatures around 25-30°C (77-86°F) and water temperatures around 23-26°C (73-79°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!