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Slettnes Lighthouse

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

Location & Light Range

About Slettnes Lighthouse

Also known as: Slettnes (Slettneset) (1 and 2)

The Slettnes Lighthouse is situated on a mainland promontory, two kilometers north of Slettnes. This fiberglass tower, standing 6 meters tall, displays a white light with two black horizontal bands and a red roof. It emits two white flashes every 8 seconds, with red and green sectors also present. The current structure replaced an earlier wooden tower. While the tower itself is closed to the public, the surrounding site is accessible.

Why it matters: Slettnes Lighthouse is the northernmost mainland lighthouse on Earth, guiding vessels along the Barents Sea coast within the Slettnes Nature Reserve.

Background
Slettnes Lighthouse is the northernmost mainland lighthouse on Earth. It is located in Gamvik Municipality in Finnmark county, Norway. It sits along the Barents Sea approximately 3 kilometres (1.9 mi) north of the village of Gamvik on the northern coast of the Nordkinn Peninsula, within the Slettnes Nature Reserve. The 39-metre (128 ft) lighthouse is the only cast iron lighthouse in Finnmark county.

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
Light Range
17.6NM (32.6 km)
Geographic Range
9.1NM

Construction & History

Significant events: Replaced an older wooden tower

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
6m
Tower Shape
square
Tower Color
white with two black horizontal bands, red roof
Material
fiberglass

Structure: fiberglass tower colored white with two black horizontal bands; roof is red

Location

City
Senja
Country
🇳🇴Norway
Region
Troms
Sea Region
Located at the tip of a promontory of the mainland, approximately 2 km north of Slettnes.
Latitude
69.3775°
Longitude
18.0969°

References & Identifiers

Nearest Port
Gibostad(1.3 km)
Admiralty No.
L3416
NGA No.
12860
ARLHS No.
NOR215
Wikipedia
Read on Wikipedia →
Wikidata
Q385142 →
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Frequently Asked Questions

How far offshore can Slettnes Lighthouse be seen?+
With a focal height of 6.5 meters and a nominal range of 17.6 nautical miles (approximately 32.6 km), Slettnes is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. Lights of this range are typically used as landfall lights by vessels approaching from the open sea.
How do mariners identify Slettnes Lighthouse at night?+
Slettnes 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 Slettnes Lighthouse guide vessels into?+
Slettnes Lighthouse assists vessels approaching 5 nearby ports. The closest is Gibostad at 1.3 NM to the SSW. Other ports served include Kårvikhamn (1.8 NM NE), Lenvik (3.5 NM NNE), Botnhamn (8.8 NM NNW), Finnsnes (8.9 NM SSW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Slettnes Lighthouse still active and maintained?+
Yes, Slettnes 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 Slettnes Lighthouse?+
You can track vessels near Slettnes 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.