Île-d'Aix is a commune in the French department of Charente-Maritime, region of Nouvelle-Aquitaine, off the west coast of France. It occupie…Île-d'Aix is a commune in the French department of Charente-Maritime, region of Nouvelle-Aquitaine, off the west coast of France. It occupies the territory of the small Isle of Aix, in the Atlantic Ocean. It is a popular place for tourist day-trips during the summer months.