Sumartin, Croatia offers 8 beaches perfect for sunbathing, surfing, swimming, and more. Sumartin is known for its picturesque beaches and tranquil atmosphere, making it a perfect destination for beach tourism. The best time to travel to Sumartin, Croatia, is from late May to September, when the average air temperature ranges from 25°C to 30°C (77°F to 86°F) and the sea temperature is around 22°C to 25°C (72°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!