Although New Hampshire's seacoast only borders 18.57 miles of the Atlantic Ocean, you won't be disappointed if you love the ocean. New Hampshire's seacoast is actually much longer than the 18 plus miles that are directly on the Atlantic Ocean. When you include New Hampshire's tidal rivers, the Great Bay estuary and the Isles of Shoals, the state's salt-water shoreline adds up to more than 238 miles!
