Kastel Gomilica, Croatia offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Kastel Gomilica is known for its historic Kastilac fortress, which was featured in the popular TV series "Game of Thrones." The best time to travel to Kastel Gomilica, Croatia, is from May to September, with average air temperatures ranging from 70°F to 85°F and water temperatures from 68°F to 77°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!