Plaja Ariadna, Romania offers 1 beach perfect for sunbathing, surfing, swimming, and more. Constanta is known for its historical landmarks like the Roman Mosaic Edifice and the Constanta Casino. The best time to travel to Plaja Ariadna, Romania, is during the summer months of June to August, when the average air temperature is around 75°F (24°C) and the water temperature is approximately 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!