Set atop the highest place on Sequin Island, the granite and brick-built Sequin Island lighthouse casts a fixed white light from an amazing 180 feet above the waters of the Atlantic Ocean, and serves as the primary beacon for the Kennebec River just to the north. During periods of fog, two horn blasts can be heard every 20 seconds.

Seguin Island’s original light station was established in 1795, followed by the construction of a full-fledged light in 1857. The United States Coast Guard automated the light in 1985, and still maintains the light as an aid to navigation today.

Five of the original buildings, including the keeper’s house, still stand here today.

Use NOAA Chart 13293.

Seguin Island Stands at the end of Seguin Ledges and Pond Island Shoal about two miles from the mouth of the Kennebec River.

Once you have picked up Seguin Island Lighthouse on your approach, a flashing green bell buoy to the north-northeast starts the approach sequence into the Kennebec River itself. Be careful of Mile Ledge to the South of the island, which is marked by a quick flashing red buoy.

Local Notices to Mariners are now available exclusively online from the U.S. Coast Guard.

Seguin Island is open to boaters, and several tour operators offer cruises to the island during the summer season. Occasionally, the lighthouse is available to tour. Contact Friends of Seguin Island, Inc. at 207-443-4808 for details.