Sveta Jelena, Croatia offers 1 beach perfect for sunbathing, surfing, swimming, and more. Sveta Jelena, Istria, Croatia, is known for its proximity to the scenic Ucka Nature Park and the historic town of Labin. The best time to travel to Sveta Jelena, 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!