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Svedudden Lighthouse

Fl (4) White/Red/Green 12s🇸🇪Norrtälje kommun, SEOperational

Location & Light Range

About Svedudden Lighthouse

This red, cylindrical concrete lighthouse, standing 7 meters tall, was first lit in 1883. It features a white horizontal band and a lantern with a gallery. The light emits four flashes in white, red, and green every 12 seconds, indicating different sectors. It is situated on a point of land near Simpnäs, within Stockholm County. The site is accessible, but the tower remains closed to visitors.

Why it matters: Svedudden is essential for safe navigation in the passage between Björkö and Arholma, a narrow strait requiring precise guidance.

Light & Optic

Characteristic Signature
Fl (4) White/Red/Green 12s
Flash Type
Flashing
Light Color
White/Red/Green
Flash Count
4 flashes
Interval
12s
Raw Code
Fl(4) WRG 12s
Focal Height
7m
Light Range
10NM (18.5 km)
Geographic Range
9.3NM

Construction & History

First Lit
1883

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
7m
Tower Shape
cylindrical
Tower Color
red with a white horizontal band
Material
concrete

Structure: round cylindrical concrete tower with lantern and gallery

Location

City
Norrtälje kommun
Country
🇸🇪Sweden
Region
Stockholm County
Sea Region
passage between Björkö and Arholma, south of Simpnäs
Latitude
59.8410°
Longitude
19.0819°

References & Identifiers

Nearest Port
Kapellskar(7.2 km)
Admiralty No.
C6373
NGA No.
10060
ARLHS No.
SWE-085
Wikidata
Q33193832 →
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Frequently Asked Questions

How far offshore can Svedudden Lighthouse be seen?+
With a focal height of 7 meters and a nominal range of 10 nautical miles (approximately 18.5 km), Svedudden 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 Svedudden Lighthouse at night?+
Svedudden displays the characteristic Fl (4) White/Red/Green 12s — 4 white/red/green flashes every 12 seconds. 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 Svedudden Lighthouse guide vessels into?+
Svedudden Lighthouse assists vessels approaching 5 nearby ports. The closest is Linanäs at 4.7 NM to the SSE. Other ports served include Kapellskär (7.5 NM S), Norrtälje (12.3 NM WSW), Grisslehamn (17.3 NM NNW), Hallstavik (19.2 NM NW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Svedudden Lighthouse still active and maintained?+
Yes, Svedudden 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 Svedudden Lighthouse?+
Svedudden 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 Svedudden Lighthouse?+
You can track vessels near Svedudden 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.