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Grundet Lighthouse

Fl (2) White/Red/Green 6s🇸🇪Gotland Municipality, SEOperational

Location & Light Range

About Grundet Lighthouse

Also known as: Grundet (Grunnet)

A 5-meter concrete pier supports the lantern room of this lighthouse, which was first lit in 1951. The tower emits two white, red, or green flashes every 6 seconds, with a focal height of 4 meters. It is situated at the western end of Grundet, a small island marking the southeastern entrance to Slite Hamn. The nearest port, Slite, is 1.2 km away. The island site is accessible to the public, though the tower itself remains closed.

Why it matters: This lighthouse is indispensable for safe navigation into Slite Hamn, guiding vessels through its southeastern entrance with its sector light system.

Light & Optic

Characteristic Signature
Fl (2) White/Red/Green 6s
Flash Type
Flashing
Light Color
White/Red/Green
Flash Count
2 flashes
Interval
6s
Raw Code
Fl(2) WRG 6s
Focal Height
4m
Geographic Range
7.9NM

Construction & History

Year Built
1951

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
5m
Tower Shape
cylindrical
Material
concrete

Structure: A 5m round concrete pier supports a lantern.

Location

City
Gotland Municipality
Country
🇸🇪Sweden
Region
Gotland County
Sea Region
Located at the west end of Grundet, a second small island at the southeastern entrance to Slite Hamn, about 3 km (1.8 mi) north of Magö.
Latitude
57.6955°
Longitude
18.8341°

References & Identifiers

Nearest Port
Slite(1.2 km)
Admiralty No.
C7184
NGA No.
9896
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Frequently Asked Questions

How do mariners identify Grundet Lighthouse at night?+
Grundet displays the characteristic Fl (2) White/Red/Green 6s — 2 white/red/green flashes every 6 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 Grundet Lighthouse guide vessels into?+
Grundet Lighthouse assists vessels approaching 5 nearby ports. The closest is Slite at 1.7 NM to the NW. Other ports served include Storugns (3.3 NM N), Kappelshamn (9.4 NM N), Strå (12.7 NM NNE), Fårösund (15 NM NNE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Grundet Lighthouse still active and maintained?+
Yes, Grundet 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 Grundet Lighthouse?+
Grundet 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 Grundet Lighthouse?+
You can track vessels near Grundet 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.