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Machias Seal Island Lighthouse

Fl W 3s🇺🇸Southern New Brunswick, USOperational

Location & Light Range

About Machias Seal Island Lighthouse

Constructed in 1832, this white octagonal tower with a red top stands 25 meters tall. Its light, first activated in 1832, emits a white flash. The focal height is also 25 meters, providing a geographic range of 17 nautical miles. The structure itself is a white octagonal tower measuring 59 feet (approximately 18 meters) in height, topped with a red section.

Why it matters: This lighthouse is recognized as a heritage lighthouse.

Light & Optic

Characteristic Signature
Fl W 3s
Flash Type
Flashing
Light Color
White
Flash Count
1 flash
Interval
3s
Raw Code
Fl
Focal Height
25m
Geographic Range
17NM

Construction & History

Year Built
1832
Heritage Status
heritage lighthouse

References & Identifiers

Admiralty No.
H4192
NGA No.
11444
Wikidata
Q21030715 →
OpenStreetMap
View on OSM →

Tower & Structure

Tower Height
25m
Tower Shape
octagonal
Tower Color
white

Structure: White octagonal tower, red top; 59

Location

City
Southern New Brunswick
Country
🇺🇸US
Latitude
44.5019°
Longitude
-67.1020°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Machias Seal Island Lighthouse at night?+
Machias Seal Island displays the characteristic Fl W 3s — 1 white flash every 3 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 Machias Seal Island Lighthouse guide vessels into?+
Machias Seal Island Lighthouse assists vessels approaching 5 nearby ports. The closest is SWF & SON INC. at 10.3 NM to the NNW. Other ports served include Grand Manan (17.6 NM NE), East Machias (18.4 NM NW), Jonesport (21.4 NM W), Lubec (21.5 NM NNE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Machias Seal Island Lighthouse still active and maintained?+
Yes, Machias Seal 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 Machias Seal Island Lighthouse?+
You can track vessels near Machias Seal 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.