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Cayo Arenas Lighthouse

Oc White 6s🇩🇴DOOperational

Location & Light Range

About Cayo Arenas Lighthouse

Also known as: Cayo Arenas (?)

This masonry lighthouse, standing 17 meters tall, is located on the outermost islet of the Cayos de los Siete Hermanos archipelago, approximately 10 kilometers off Punta Rusia in the northwestern Dominican Republic. It features a red tower topped with a black lantern, and its focal height reaches 20 meters. The light emitted a white occulting flash every six seconds, with a geographic range of 13.2 nautical miles. In 2018, powerful hurricane waves overturned the structure, rendering it inactive. The site is open to visitors, but the tower itself remains closed.

Why it matters: The Cayo Arenas lighthouse was essential for safe navigation around the Cayos de los Siete Hermanos, a cluster of islets off Punta Rusia, guiding ships through potentially hazardous shallow waters in the northwestern Dominican Republic.

Light & Optic

Characteristic Signature
Oc White 6s
Flash Type
Occulting
Light Color
White
Interval
6s
Raw Code
Oc W 6s
Focal Height
20m
Geographic Range
13.2NM

Construction & History

Significant events: Tower overturned by hurricane waves (2018)

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
17m
Tower Shape
lantern
Tower Color
Red tower with black lantern
Material
masonry

Structure: red tower, black lantern, according to NGA

Location

Country
🇩🇴Dominican Republic
Region
Monte Cristi
Sea Region
Outermost islet of the Cayos de los Siete Hermanos, approximately 10 km off Punta Rusia, in the northwestern Dominican Republic.
Latitude
19.8699°
Longitude
-71.8643°

References & Identifiers

Nearest Port
Manzanillo(11.2 km)
Admiralty No.
J5422
NGA No.
14240
ARLHS No.
DOM-004
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Frequently Asked Questions

How do mariners identify Cayo Arenas Lighthouse at night?+
Cayo Arenas displays the characteristic Oc White 6s. 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 Cayo Arenas Lighthouse guide vessels into?+
Cayo Arenas Lighthouse assists vessels approaching 5 nearby ports. The closest is Salcedo at 11.7 NM to the SE. Other ports served include Manzanillo (12.1 NM SSE), Puerto Libertador (12.1 NM SSE), Fort Liberte (12.4 NM S), Caracol (14.1 NM SW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Cayo Arenas Lighthouse still active and maintained?+
Yes, Cayo Arenas 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 Cayo Arenas Lighthouse?+
You can track vessels near Cayo Arenas 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.