Located on the ground floor is the Chelsea's 10,000-square-foot luxury Sea Spa which draws its inspiration from one of the great traditions and original attractions of Atlantic City: the nourishing, soothing, and healing properties of the sea and specifically salt. Also known as the alchemists' fifth element, salt has been considered a panacea for thousands of years, as has Solé ("sol-ay"), the fusion of salt crystals and water into pure light energy to restore the body's perfect balance.

With packages tailored to women, men, and couples, Sea Spa features ten private treatment rooms, including two wet-treatment rooms and the Solarium, comprised of two Jacuzzis, a sauna, and steam room. All of the spaces are rendered in natural materials such as heated stone benches and teak ceilings and walls to create a soothing, meditative atmosphere.