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Isla de Mona Lighthouse

Fl White 5s🇺🇸USOperational

Location & Light Range

About Isla de Mona Lighthouse

A 12-meter skeletal steel tower marks this station, located on the north side of Isla de Mona. The current structure was built in 1976, replacing an earlier light station established in 1900. Its light displays a white flash every 5 seconds and has a geographic range of 24.7 nautical miles. The focal plane is situated 98.5 meters above sea level. The site itself is open to visitors, though the tower remains closed.

Why it matters: This light guides vessels navigating between Puerto Rico and the Dominican Republic, helping them avoid hazards in this ecologically significant area.

Light & Optic

Characteristic Signature
Fl White 5s
Flash Type
Flashing
Light Color
White
Interval
5s
Raw Code
Fl W 5s
Focal Height
98.5m
Geographic Range
24.7NM

Construction & History

Year Built
1976
First Lit
1900

Significant events: Station established 1900, current tower built 1976

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
12m
Tower Shape
skeletal
Material
steel

Structure: A 12m skeletal tower.

Location

Country
🇺🇸United States
Region
Puerto Rico
Sea Region
Located on heights on the north side of Isla de Mona, far from the original light station.
Latitude
18.1095°
Longitude
-67.9082°

References & Identifiers

Nearest Port
Punta cana(35.5 km)
Admiralty No.
J5486
NGA No.
14412
USCG No.
3-32295
ARLHS No.
PUR-011
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Frequently Asked Questions

How do mariners identify Isla de Mona Lighthouse at night?+
Isla de Mona displays the characteristic Fl White 5s. 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 white color may indicate a specific sector or warning zone.
Which ports and harbors does Isla de Mona Lighthouse guide vessels into?+
Isla de Mona Lighthouse assists vessels approaching 5 nearby ports. The closest is Punta cana at 35.5 NM to the NW. Other ports served include PUNTA CANA (35.7 NM NW), CLUB NAUTICO RINCON (39.5 NM ENE), Mayagüez (42.9 NM E), Aguadilla (47.2 NM ENE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Isla de Mona Lighthouse still active and maintained?+
Yes, Isla de Mona 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 Isla de Mona Lighthouse?+
You can track vessels near Isla de Mona 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.