One Night deluxe accomodations with breakfast for two at the Waterfront Sheraton Portsmouth Harborside Hotel in Portsmouth, NH. From its vantage point on the Piscataqua River, the Sheraton Portsmouth Harborside Hotel looks out over New Hampshire’s bustling international port, where ships arrive regularly from around the world. Our warm and friendly staff will welcome you into the grand lobby, where sweeping views of the river and harbor activity will capture your imagination.