The Spa at The Ritz-Carlton Key Biscayne, Miami

This is the spa wing of The Ritz-Carlton Key Biscayne, a hotel property on Grand Bay Drive, built around private treatment suites, a relaxation lounge and a restaurant or café, with ocean or lake views from parts of the space. Facilities include a sauna, steam room and whirlpool, and the spa offers couples treatments alongside standard massage and facial services. English is the working language on-site.

Access is restricted: this is a hotel-guest-only facility, adults-only with a minimum age of 18, and there are no walk-ins — everything runs by reservation. That makes it a fit for guests staying at the Ritz-Carlton rather than a drop-in day-spa option for outside visitors, though hotel guests can book treatments and use the wet amenities as part of their stay.

Hours run 9:00 a.m. to 5:00 p.m. Monday through Thursday and Sunday, and extend to 6:00 p.m. Friday and Saturday. The spa boutique on the lobby level keeps similar daily hours. Pricing sits at the top end of the scale (tier 4, luxury), consistent with a five-star resort spa rather than a budget wellness stop.

Worth noting for planning: parts of the spa were undergoing renovation with a reopening targeted for January 2026, so anyone booking around that window should confirm current status and which amenities are operating directly with the hotel before arrival.