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Ágios Sóstis Lighthouse

Fl White/Red 5s🇬🇷Municipal Unit of Iera Poli Messologhiou, GROperational

Location & Light Range

About Ágios Sóstis Lighthouse

The Ágios Sóstis lighthouse, constructed from white stone, stands 11 meters tall with its light at 12 meters. This cylindrical tower, built in 1859, features a lantern and gallery and is attached to a one-story keeper's house. It is located on the island of Ágios Sóstis, north of the Gulf of Patraikós, marking the entrance to Mesolóngi bay. The lighthouse emits a white or red light, with a single flash every 5 seconds, visible for 11 nautical miles. The structure itself is part of a small island complex that also includes a chapel and a ruined customshouse.

Why it matters: This lighthouse is essential for safe navigation into Mesolóngi bay from the Gulf of Patraikós, guiding vessels through coastal waters and helping them avoid hazards at the bay's entrance.

Light & Optic

Characteristic Signature
Fl White/Red 5s
Flash Type
Flashing
Light Color
White/Red
Interval
5s
Raw Code
Fl 5s
Focal Height
12m
Geographic Range
11NM

Construction & History

Year Built
1859

References & Identifiers

Nearest Port
Mesolongion(2.8 km)
Admiralty No.
N3912
NGA No.
14756
ARLHS No.
GRE-055

Tower & Structure

Tower Height
11m
Tower Shape
cylindrical
Tower Color
white stone
Material
stone

Structure: stone tower with lantern and gallery, attached to the seaward side of a 1-story keeper's house

Location

City
Municipal Unit of Iera Poli Messologhiou
Country
🇬🇷Greece
Region
Western Greece
Sea Region
The island of Ágios (Saint) Sostís lies on the north side of the Gulf of Patraikós in the entrance to the bay of Mesolóngi about 8 km (5 mi) southwest of the city of Mesolóngi.
Latitude
38.3212°
Longitude
21.3745°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Ágios Sóstis Lighthouse at night?+
Ágios Sóstis displays the characteristic Fl White/Red 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/red color may indicate a specific sector or warning zone.
Which ports and harbors does Ágios Sóstis Lighthouse guide vessels into?+
Ágios Sóstis Lighthouse assists vessels approaching 5 nearby ports. The closest is Mesolóngion at 3.2 NM to the NE. Other ports served include Araxos (7.3 NM S), KRIONERI (10.5 NM E), Kryoneri (10.5 NM E), Káto Achaïa (12.7 NM SE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Ágios Sóstis Lighthouse still active and maintained?+
Yes, Ágios Sóstis 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 Ágios Sóstis Lighthouse?+
Ágios Sóstis 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 Ágios Sóstis Lighthouse?+
You can track vessels near Ágios Sóstis 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.