Mamaia, Romania offers 19 beaches perfect for sunbathing, surfing, swimming, and more. Mamaia is known for its vibrant beach resorts and lively nightlife. The best time to travel to Mamaia, 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!