Mirca, Croatia offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Mirca is known for its proximity to the beautiful beaches and historic sites of the island of Brac. The best time to travel to Mirca, 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!