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Gunvorsgrund Lighthouse

Fl (3) White/Red/Green 9s🇸🇪Umeå kommun, SEOperational

Location & Light Range

About Gunvorsgrund Lighthouse

This cylindrical concrete lighthouse, built in 1971, stands 23 meters tall and is located about 25 kilometers southeast of Umeå in the Gulf of Bothnia. Its lower half is painted white, while the upper half is black. The light emits three flashes of white, red, or green every nine seconds, depending on the direction. The site is open to visitors, though the tower itself is closed.

Why it matters: Gunvorsgrund lighthouse is essential for safe navigation in the Gulf of Bothnia, particularly guiding vessels approaching or departing Umeå. Its directional light system provides precise guidance through specific channels and around submerged hazards.

Light & Optic

Characteristic Signature
Fl (3) White/Red/Green 9s
Flash Type
Flashing
Light Color
White/Red/Green
Flash Count
3 flashes
Interval
9s
Raw Code
Fl(3) WRG 9s
Focal Height
22m
Light Range
9NM (16.7 km)
Geographic Range
13.6NM

Construction & History

Year Built
1971

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
23m
Tower Shape
cylindrical
Tower Color
black and lower half white
Material
concrete

Structure: round cylindrical concrete tower with lantern and gallery, upper half painted black and lower half white

Location

City
Umeå kommun
Country
🇸🇪Sweden
Region
Västerbotten County
Sea Region
Gulf of Bothnia, about 25 km southeast of Umeå
Latitude
63.4879°
Longitude
20.4274°

References & Identifiers

Nearest Port
Holmsund(12.7 km)
Admiralty No.
C5880
NGA No.
11132
ARLHS No.
SWE-165
Wikidata
Q38885888 →
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Frequently Asked Questions

How far offshore can Gunvorsgrund Lighthouse be seen?+
With a focal height of 22 meters and a nominal range of 9 nautical miles (approximately 16.7 km), Gunvorsgrund 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 Gunvorsgrund Lighthouse at night?+
Gunvorsgrund displays the characteristic Fl (3) White/Red/Green 9s — 3 white/red/green flashes every 9 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 Gunvorsgrund Lighthouse guide vessels into?+
Gunvorsgrund Lighthouse assists vessels approaching 5 nearby ports. The closest is Holmsund at 13 NM to the N. Other ports served include Obbola (13 NM N), Hörnefors (16.6 NM WNW), KLOBBSKAT (21 NM ESE), Umeå (21.3 NM NNW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Gunvorsgrund Lighthouse still active and maintained?+
Yes, Gunvorsgrund 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 Gunvorsgrund Lighthouse?+
Gunvorsgrund 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 Gunvorsgrund Lighthouse?+
You can track vessels near Gunvorsgrund 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.