The One&Only Spa at One&Only Royal Mirage sits within the resort's Residence & Spa wing on the Al Sufouh beachfront, between Dubai Marina and Dubai Media City. The resort's Arabian palace architecture extends into the spa, and its best-known feature is a separate Oriental Hammam, a domed space dedicated to traditional bathing rituals with exfoliation, massage and rest.

The spa offers immersive wellness rituals, massage and body treatments and expert beauty treatments, with a focus on calm and beachside serenity. The Oriental Hammam is run as its own space with separate hours and contacts, and it is one of the most atmospheric hammams in Dubai. A Bastien Gonzalez studio brings the French podiatrist's signature fusion of foot care and beauty, the famous Bastien pedicure among them. Outdoor wellbeing is part of the offer, with yoga and mindfulness classes held by the pool, in the gardens or on the beach. A day pass is available for non-residents, and the resort has run a beach day package combining pool and beach access at Arabian Court, afternoon tea at the Samovar Lounge and a 60-minute spa treatment. The spa itself is open daily from 9am to 9pm, and bookings can be made by phone or email.