This Portsmouth, New Hampshire hotel is situated in the center of the downtown historic waterfront district. It features an indoor pool, spa services and rooms with free Wi-Fi. Each room features a flat-screen cable TV and a minibar at the Sheraton Portsmouth Harborside Hotel. Coffee facilities are also included. Harborside Hotel Sheraton Portsmouth provides a sauna and a gym. The hotel also features Riverwatch Lounge and Harbors Edge Restaurant. The hotel is less than one mile from Market Square and Portsmouth Music Hall. The Museum-Albacore Submarine is one mile from the Portsmouth Sheraton Harborside Hotel.