Mesimvria, Greece offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Mesimvria, East Macedonia and Thrace, Greece, is known for the archaeological site of Ancient Mesimvria. The best time to travel to Mesimvria, Greece, is from June to September, when the average air temperature is around 25-30°C (77-86°F) and the water temperature is approximately 24-26°C (75-79°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!