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Sälsö Lighthouse

Oc White/Red/Green 6s🇫🇮Sottunga, FIOperational

Location & Light Range

About Sälsö Lighthouse

This square, steel skeletal tower stands 10 meters tall on Sälsö island, an island between Sottunga and Husö. Its lantern and gallery sit at a focal height of 29 meters, emitting a light that reaches 15.1 nautical miles. The light cycles through white, red, and green every 6 seconds. Originally part of a navigational range, the light's function was adapted when its companion light was moved to a smaller tower due to an alignment change. The site is accessible, but the tower remains closed to the public.

Why it matters: The lighthouse's directional light is essential for navigating the channels between Sottunga and Husö, warning mariners of hazards and guiding them along specific routes.

Light & Optic

Characteristic Signature
Oc White/Red/Green 6s
Flash Type
Occulting
Light Color
White/Red/Green
Interval
6s
Raw Code
Oc WGR 6s
Focal Height
29m
Light Range
9.9NM (18.3 km)
Geographic Range
15.1NM

Construction & History

Significant events: Originally rear light of a range, range light moved to smaller tower due to alignment change

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
10m
Tower Shape
square
Tower Color
white with one black horizontal band
Material
steel

Structure: square skeletal tower with lantern and gallery

Location

City
Sottunga
Country
🇫🇮Finland
Region
Åland Islands
Sea Region
Sälsö, an island between Sottunga and Husö
Latitude
60.0753°
Longitude
20.7486°

References & Identifiers

Nearest Port
Degerby(11.2 km)
Admiralty No.
C4615.1.
NGA No.
C4615.1
Wikidata
Q62017352 →
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Frequently Asked Questions

How far offshore can Sälsö Lighthouse be seen?+
With a focal height of 29 meters and a nominal range of 9.9 nautical miles (approximately 18.3 km), Sälsö 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 Sälsö Lighthouse at night?+
Sälsö displays the characteristic Oc White/Red/Green 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/red/green color may indicate a specific sector or warning zone.
Which ports and harbors does Sälsö Lighthouse guide vessels into?+
Sälsö Lighthouse assists vessels approaching 5 nearby ports. The closest is Kökar at 9.3 NM to the SSE. Other ports served include Föglö (10.6 NM WSW), Degerby (11.2 NM WSW), Långnäs (13.6 NM W), Kumlinge (13.7 NM N). Mariners should consult the relevant chart for full approach and pilotage information.
Is Sälsö Lighthouse still active and maintained?+
Yes, Sälsö 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 Sälsö Lighthouse?+
Sälsö Lighthouse is located within the Baltic Sea trade route — a vital shipping corridor for trade between Scandinavian, German, Polish, and Baltic state ports. This makes it an important navigation reference for commercial shipping traffic in the region.
How can I track vessels near Sälsö Lighthouse?+
You can track vessels near Sälsö 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.