Mamaia Sat, Romania offers 10 beaches perfect for sunbathing, surfing, swimming, and more. Mamaia Sat, Constanta, Romania, is known for its proximity to the popular Black Sea resort of Mamaia, featuring vibrant nightlife and sandy beaches. The best time to travel to Mamaia Sat, Romania, is from June to August, when the average air temperature is around 25°C (77°F) and the water temperature is approximately 23°C (73°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!