Sveti Jakov, Croatia offers 6 beaches perfect for sunbathing, surfing, swimming, and more. Sveti Jakov is known for its proximity to the beautiful Kvarner Bay and the nearby Ucka Nature Park. The best time to travel to Sveti Jakov, Croatia, is from June to September, with average air temperatures around 75°F (24°C) and water temperatures around 72°F (22°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!