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Gaiduronísi Lighthouse

Fl White 6s🇬🇷Municipality of Syros and Ermoupoli, GROperational

Location & Light Range

About Gaiduronísi Lighthouse

Also known as: Gaiduronísi (Dhidhimi, Nisída Gáïdaros)

This cylindrical stone lighthouse, standing 29 meters tall with a focal height of 68 meters, was constructed in 1834. It features a white stone tower with a lantern and gallery, attached to a one-story keeper's house. Located on an island about 3 kilometers east of Ermoúpolis, Síros, the structure emits a white flash every six seconds. Its geographic range is 21.2 nautical miles. The nearest port is Syros, located 1.3 kilometers away.

Why it matters: As the tallest lighthouse in Greece, its construction by French engineers for the Ottoman Empire represents significant historical engineering.

Light & Optic

Characteristic Signature
Fl White 6s
Flash Type
Flashing
Light Color
White
Interval
6s
Raw Code
Fl W 6s
Focal Height
68m
Geographic Range
21.2NM

Construction & History

Year Built
1834

References & Identifiers

Nearest Port
Syros(1.3 km)
ARLHS No.
GRE-069

Tower & Structure

Tower Height
29m
Tower Shape
cylindrical
Tower Color
white stone
Material
stone

Structure: round stone tower with lantern and gallery, attached to a 1-story keeper's house

Location

City
Municipality of Syros and Ermoupoli
Country
🇬🇷Greece
Region
South Aegean
Sea Region
An island approximately 3 km east of Ermoúpolis, Síros.
Latitude
37.4271°
Longitude
24.9719°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Gaiduronísi Lighthouse at night?+
Gaiduronísi displays the characteristic Fl 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 Gaiduronísi Lighthouse guide vessels into?+
Gaiduronísi Lighthouse assists vessels approaching 5 nearby ports. The closest is Syros (Syra) at 1.5 NM to the WNW. Other ports served include Tínos (11 NM NE), Órmos Panórmou (13.9 NM NNE), Delos (14 NM E), Mykonos (16.8 NM E). Mariners should consult the relevant chart for full approach and pilotage information.
Is Gaiduronísi Lighthouse still active and maintained?+
Yes, Gaiduronísi 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.
What shipping routes pass near Gaiduronísi Lighthouse?+
Gaiduronísi Lighthouse is located within the Mediterranean East-West corridor — a major trade route spanning the Mediterranean from Gibraltar to the Suez Canal. This makes it an important navigation reference for commercial shipping traffic in the region.
How can I track vessels near Gaiduronísi Lighthouse?+
You can track vessels near Gaiduronísi 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.