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Tjeldholmgrunnen Lighthouse

Iso Red 4s🇳🇴Hvaler, NOOperational

Location & Light Range

About Tjeldholmgrunnen Lighthouse

This lighthouse stands 15 meters tall on a post, topped with a lantern and gallery. Its structure is painted white and features a single narrow red horizontal band, with a red lantern roof. The operational light emits a red isophase flash every 4 seconds, visible for nearly 12 nautical miles. It is located off the northeastern coast of Tjeldholmen, an island west of the Løperen and north of Asmaløy, near Hvaler. The site is open for public access by boat, though the tower itself remains closed.

Why it matters: The lighthouse warns vessels of the Tjeldholmgrunnen shallow area, ensuring safe passage through the coastal channels between Tjeldholmen and Asmaløy.

Light & Optic

Characteristic Signature
Iso Red 4s
Flash Type
Isophase
Light Color
Red
Interval
4s
Raw Code
Iso R 4s
Focal Height
15m
Geographic Range
11.9NM

Location

City
Hvaler
Country
🇳🇴Norway
Region
Østfold
Sea Region
Off the northeastern coast of Tjeldholmen, an island on the west side of the Løperen north of Asmaløy.
Latitude
59.1061°
Longitude
10.9696°

References & Identifiers

Nearest Port
Hvaler(5.5 km)
Admiralty No.
B2241
NGA No.
0161

Tower & Structure

Tower Height
15m
Tower Color
White with one narrow red horizontal band, lantern roof is red

Structure: A 15m post with lantern and gallery, painted white with one narrow red horizontal band, and a red lantern roof.

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Tjeldholmgrunnen Lighthouse at night?+
Tjeldholmgrunnen displays the characteristic Iso Red 4s. 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 red color may indicate a specific sector or warning zone.
Which ports and harbors does Tjeldholmgrunnen Lighthouse guide vessels into?+
Tjeldholmgrunnen Lighthouse assists vessels approaching 5 nearby ports. The closest is Utgårdskilen at 3.5 NM to the WSW. Other ports served include Fredrikstad (5.1 NM N), Hvaler (5.4 NM SSE), VIKERKILEN ROAD (5.6 NM NNW), Skjærhalden (5.7 NM SSE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Tjeldholmgrunnen Lighthouse still active and maintained?+
Yes, Tjeldholmgrunnen 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 Tjeldholmgrunnen Lighthouse?+
Tjeldholmgrunnen 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 Tjeldholmgrunnen Lighthouse?+
You can track vessels near Tjeldholmgrunnen 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.