Mahdia, Tunisia offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Mahdia is known for its beautiful beaches and rich historical sites, including the Great Mosque and the ancient city walls. The best time to travel to Mahdia, Tunisia, is from May to October, when the average air temperature is around 25-30°C (77-86°F) and the average water temperature is approximately 22-26°C (72-79°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!