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Assenta Lighthouse

L White 5s🇵🇹Torres Vedras, PTOperational

Location & Light Range

About Assenta Lighthouse

Assenta Lighthouse is a white concrete tower situated atop a steep bluff in São Pedro da Cadeira, near Torres Vedras, Portugal. The square structure stands 6 meters tall, with its light positioned 80 meters above sea level. It emits a white flash every 5 seconds, visible for 22.6 nautical miles. While the tower itself is closed to visitors, the site is accessible, offering panoramic views of the Atlantic Ocean and the coastline. The lighthouse is located about 17.5 kilometers from the nearest port at Peniche.

Why it matters: The Assenta Lighthouse provides coastal navigation guidance, helping vessels maintain safe distances from the bluff and shoreline. Its functional design ensures reliable operation for local fishing fleets and larger maritime traffic.

Light & Optic

Characteristic Signature
L White 5s
Flash Type
L
Light Color
White
Interval
5s
Raw Code
L Fl W 5s
Focal Height
80m
Light Range
13NM (24.1 km)
Geographic Range
22.6NM

Location

City
Torres Vedras
Country
🇵🇹Portugal
Region
Lisbon
Sea Region
atop a steep bluff in São Pedro da Cadeira
Latitude
39.0590°
Longitude
-9.4145°

References & Identifiers

Nearest Port
Peniche(17.5 km)
Admiralty No.
D2102
NGA No.
3368
Wikidata
Q28374961 →

Tower & Structure

Tower Height
6m
Tower Shape
square
Tower Color
white concrete tower
Material
concrete

Structure: square unpainted white concrete tower

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 Assenta Lighthouse be seen?+
With a focal height of 80 meters and a nominal range of 13 nautical miles (approximately 24.1 km), Assenta 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 Assenta Lighthouse at night?+
Assenta displays the characteristic L 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 Assenta Lighthouse guide vessels into?+
Assenta Lighthouse assists vessels approaching 5 nearby ports. The closest is Azenhas do Mar at 13.7 NM to the S. Other ports served include Peniche (17.8 NM N), Cacém (18.3 NM SSE), Vila Franca de Xira (21.2 NM ESE), Estoril (21.5 NM S). Mariners should consult the relevant chart for full approach and pilotage information.
Is Assenta Lighthouse still active and maintained?+
Yes, Assenta 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 Assenta Lighthouse?+
You can track vessels near Assenta 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.