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Grasholmen Lighthouse

Oc (2) White/Red/Green 8s🇳🇴Harstad, NOOperational

Location & Light Range

About Grasholmen Lighthouse

Grasholmen lighthouse is a square tower with a lantern and gallery, standing 6 meters tall with a focal height of 6.5 meters. Its black structure is situated on the eastern end of an island at the northern entrance to the Tjeldsund, approximately 18 kilometers south of Harstad. The light emits two white, red, or green flashes every 8 seconds, providing a geographic range of 9.1 nautical miles. This operational lighthouse serves as a navigational aid in the Troms region of Norway. The tower is not accessible to the public, but the island site is open for exploration.

Why it matters: This lighthouse is essential for safe navigation through the Tjeldsund, a critical strait for local and regional shipping. Its directional light, changing color with approach, offers precise guidance to mariners entering from the north.

Light & Optic

Characteristic Signature
Oc (2) White/Red/Green 8s
Flash Type
Occulting
Light Color
White/Red/Green
Flash Count
2 flashes
Interval
8s
Raw Code
Oc(2) WRG 8s
Focal Height
6.5m
Geographic Range
9.1NM

Location

City
Harstad
Country
🇳🇴Norway
Region
Troms
Sea Region
East end of an island at the northern entrance to the Tjeldsund, about 18 km south of Harstad.
Latitude
68.6698°
Longitude
16.6361°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
6m
Tower Shape
square
Tower Color
black

Structure: square tower with lantern and gallery

References & Identifiers

Nearest Port
Tovik(4.6 km)
Admiralty No.
L3322
NGA No.
12620
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Frequently Asked Questions

How do mariners identify Grasholmen Lighthouse at night?+
Grasholmen displays the characteristic Oc (2) White/Red/Green 8s — 2 white/red/green flashes every 8 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 Grasholmen Lighthouse guide vessels into?+
Grasholmen Lighthouse assists vessels approaching 5 nearby ports. The closest is Tovik at 5.8 NM to the E. Other ports served include Harstad (7.4 NM N), Fjelldal (7.8 NM SSW), Grovfjord (10.5 NM E), Ramsund (11.6 NM SSW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Grasholmen Lighthouse still active and maintained?+
Yes, Grasholmen 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.
How can I track vessels near Grasholmen Lighthouse?+
You can track vessels near Grasholmen 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.