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Fort Gratiot Lighthouse

Fl G 6s🇨🇦Michigan's Eastern Lower Peninsula, CAOperational

Location & Light Range

About Fort Gratiot Lighthouse

The Fort Gratiot Lighthouse stands 26 meters tall with a green tower and emits a green light. It was constructed and first illuminated in 1825. The lighthouse has a focal height of 26 meters and a geographic range of 16 nautical miles. It is a navigational aid operating on the eastern side of Michigan's Lower Peninsula.

Why it matters: Recognized as a Michigan state historic site, Fort Gratiot Lighthouse holds historical significance.

Light & Optic

Characteristic Signature
Fl G 6s
Flash Type
Flashing
Light Color
Green
Flash Count
1 flash
Interval
6s
Raw Code
Fl
Focal Height
26m
Geographic Range
16NM

Construction & History

Year Built
1825
Heritage Status
Michigan state historic site

References & Identifiers

Admiralty No.
LLNR 10015
Wikipedia
Read on Wikipedia →
Wikidata
Q5471242 →
OpenStreetMap
View on OSM →

Tower & Structure

Tower Height
26m
Tower Color
green

Location

City
Michigan's Eastern Lower Peninsula
Country
🇨🇦CA
Latitude
43.0063°
Longitude
-82.4225°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Fort Gratiot Lighthouse at night?+
Fort Gratiot displays the characteristic Fl G 6s — 1 green flash every 6 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. The green color may indicate a specific sector or warning zone.
Which ports and harbors does Fort Gratiot Lighthouse guide vessels into?+
Fort Gratiot Lighthouse assists vessels approaching 5 nearby ports. The closest is Point Edward at 1.1 NM to the ESE. Other ports served include Port Huron (1.1 NM SSW), Sarnia (2.1 NM SSE), MOORETOWN (9.6 NM SSW), Courtright (11.5 NM S). Mariners should consult the relevant chart for full approach and pilotage information.
Is Fort Gratiot Lighthouse still active and maintained?+
Yes, Fort Gratiot 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 Fort Gratiot Lighthouse?+
You can track vessels near Fort Gratiot 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.