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Las Grutas Lighthouse

Oc White 2s🇦🇷Las Grutas, AROperational

Location & Light Range

About Las Grutas Lighthouse

The Las Grutas light is situated atop a 30-meter round cylindrical water tank, serving as a navigational aid for the coastal resort town of Las Grutas. This structure, with a focal height of 71 meters, emits an occulting white light every two seconds, providing a geographic range of 21.5 nautical miles. The light is located in the Río Negro region of Argentina, approximately 15 kilometers south of San Antonio Oeste. While the site is open to the public, the water tank structure itself is closed for ascent. It guides vessels toward Las Grutas, a popular destination for tourists and locals.

Why it matters: This light serves as a distinctive visual reference point for recreational and smaller commercial vessels navigating the coast near the resort town.

Light & Optic

Characteristic Signature
Oc White 2s
Flash Type
Occulting
Light Color
White
Interval
2s
Raw Code
Oc W 2s
Focal Height
71m
Light Range
10NM (18.5 km)
Geographic Range
21.5NM

Location

City
Las Grutas
Country
🇦🇷Argentina
Region
Río Negro
Sea Region
Las Grutas, a beach resort town about 15 km south of San Antonio Oeste.
Latitude
-40.7974°
Longitude
-65.0751°

References & Identifiers

Nearest Port
San Antonio Este(8.2 km)
Admiralty No.
G1045
NGA No.
19626
ARLHS No.
ARG-115
Wikidata
Q115219697 →

Tower & Structure

Tower Height
30m
Tower Shape
cylindrical

Structure: A 30m round cylindrical water tank with a light.

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How far offshore can Las Grutas Lighthouse be seen?+
With a focal height of 71 meters and a nominal range of 10 nautical miles (approximately 18.5 km), Las Grutas is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. This range makes it a significant coastal navigation aid for vessels transiting the area.
How do mariners identify Las Grutas Lighthouse at night?+
Las Grutas displays the characteristic Oc White 2s. 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 Las Grutas Lighthouse guide vessels into?+
Las Grutas Lighthouse assists vessels approaching 2 nearby ports. The closest is San Antonio Este at 8.5 NM to the E. Other ports served include SAN ANTONIO OESTE (9.6 NM ENE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Las Grutas Lighthouse still active and maintained?+
Yes, Las Grutas 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 Las Grutas Lighthouse?+
You can track vessels near Las Grutas 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.