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Libby Island Lighthouse

Fl W 20s🇺🇸Eastern Maine, USOperational

Libby Island Light is a round, brick tower standing 13 meters tall. Built in 1822, it became operational in the same year, displaying a white light with a flash characteristic. The focal height of the light is 28 meters, providing a geographic range of 18 nautical miles. The tower itself is painted white. This lighthouse is situated on Libby Island at the entrance to Machias Bay.

Why it matters: The Libby Island Light Station is listed on the National Register of Historic Places.

Background
Libby Island Light is a lighthouse on Libby Island, marking the mouth of Machias Bay, in Machiasport, Maine. The light station was established in 1817 and is an active aid to navigation; the present granite tower was built in 1823 and improved in 1848. Libby Island Light was listed on the National Register of Historic Places as Libby Island Light Station on June 18, 1976.
Characteristic Signature
Fl W 20s
Flash Type
Flashing
Light Color
White
Flash Count
1 flash
Interval
20s
Raw Code
Fl
Focal Height
28m
Geographic Range
18NM
Year Built
1822
Heritage Status
National Register of Historic Places listed place
Admiralty No.
J0024
USCG No.
1-1120
ARLHS No.
USA-432
Wikidata
Q6540433
OpenStreetMap
View on OSM →
Tower Height
13m
Tower Shape
round
Tower Color
white
Material
brick
City
Eastern Maine
Country
🇺🇸US
Latitude
44.5683°
Longitude
-67.3673°
Flag
Type
Name
Dist.
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How do mariners identify Libby Island Lighthouse at night?+
Libby Island displays the characteristic Fl W 20s — 1 white flash every 20 seconds. Each lighthouse has a unique flash pattern published in the List of Lights, allowing mariners to positively identify it and distinguish it from other navigation aids in the area.
Which ports and harbors does Libby Island Lighthouse guide vessels into?+
Libby Island Lighthouse assists vessels approaching 5 nearby ports. The closest is SWF & SON INC. at 8.4 NM to the NE. Other ports served include East Machias (9.9 NM N), Jonesport (10.2 NM WSW), Addison (15.7 NM WSW), Milbridge (21.9 NM W). Mariners should consult the relevant chart for full approach and pilotage information.
Is Libby Island Lighthouse still active and maintained?+
Yes, Libby Island Lighthouse is currently operational. It is actively maintained and continues to emit its characteristic light signal for marine navigation. Most modern lighthouses are automated and monitored remotely by the national maritime authority.
How can I track vessels near Libby Island Lighthouse?+
You can track vessels near Libby Island Lighthouse in real time using MarineRadar. The platform shows live AIS positions of ships in the area, including vessel name, type, flag, speed, and course. Use the "Track Vessels Nearby" button on this page to open the live map centered on this lighthouse.