Thalassa Sea & Spa is the wellness centre of Le Medina Essaouira Thalassa Sea & Spa, MGallery Collection, the seafront hotel on Avenue Mohamed V at the edge of the Essaouira medina. It runs 12 dry treatment cabins and 5 hydrotherapy cabins around a traditional Moroccan hammam, and works with the Thalassa Sea & Skin range alongside organic Souiri products from a local women's cooperative. The centre opens 9am to 8pm every day, although the heated indoor seawater pool stays closed while the hotel renovates until September 2026.