Luka, Croatia offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Zadar, Croatia, is known for its Sea Organ and Sun Salutation. The best time to travel to Luka, 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!