Portsmouth Harbor Lighthouse
New Castle, New Hampshire
New England Lighthouse Tours - Personalized minivan tours based in Portsmouth, NH.
Location: Next to Fort Constitution, near the mouth of the Piscataqua River, Portsmouth Harbor
Coordinates: 43 04 16 N 70 42 31 W
View Portsmouth Harbor Lighthouse in a larger map
Active U.S. Coast Guard aid to navigation.
Lighthouse is managed by Friends of Portsmouth Harbor Lighthouses, a chapter of the American Lighthouse Foundation.
Open for public open houses on Sunday afternoons, 1 to 5 p.m., from Memorial Day weekend in late May to Columbus Day weekend in October. Visit Friends of Portsmouth Harbor Lighthouses for more details.
Station Established: 1771
Present Tower Built: 1878
Construction Material: Cast iron with brick lining
Other buildings still standing: 1872 keeper's house, 1903 oil house
Tower Height: 48 feet
Focal Plane: 52 feet
Present optic: Fourth-order Fresnel lens (below)
Characteristic: Fixed Green; Visibility: 12 nautical miles
Fog signal: Mariner Radio Activated Sound Signal (MRASS), one blast every 10 seconds
Click below to hear the fog signal
Fort Constitution History
New Castle, NH
Portsmouth Chamber of Commerce
U.S. Coast Guard Station Portsmouth Harbor