Contact Us

Isles of Shoals Steamship Company
315 Market Street
Portsmouth, NH. 03801
Office Hours

Office hours vary due to the seasonal nature of our business. Please check our most up to date hours by giving us a call at: (603) 431-5500.

Hours are updated weekly on our automated phone system.


315 Market Street
Portsmouth, NH 03801

We are directly across the street from the Sheraton Harborside Hotel

Telephone (800) 441-4620 / (603) 431-5500


We have convenient on-site parking at $5.00 per vehicle. Parking in our lot is for the duration of your cruise only. Large vehicles may not be able to be accommodated in our lot. Please call prior to your arrival for assistance with the parking of large vehicles.

Parking is also available at the Hanover Street Parking garage in downtown Portsmouth, just a short walk from our dock. The Hanover Street Parking garage charges $1.25 per hour for parking in the garage, $15 for 12 hours, and $30 for 24 hour parking. Cash or Check ONLY (ATM on site).