Automated in 1985, the buildings of the light station are now operated as a museum property by a non-profit organization, and are seasonally open to the public via scheduled ferry from Popham Beach in Phippsburg.

The light station is located at the island's highest point, and includes the lighthouse itself, the keeper's house, fog signal building, a small oilhouse, and a tramway for bringing supplies from the shore to the site.

[7] Seguin Light was deactivated by the coast guard in April 2019 due to a power cable problem.

The lighthouse is awaiting a generator, and eventually a more permanent fix in the form of solar panels.

[1] In the meantime, the coast guard has set up a temporary solar beacon as a navigational aid.