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Asmalsund Lighthouse

Oc (3) White/Red/Green 10s🇳🇴Hvaler, NOOperational

Location & Light Range

About Asmalsund Lighthouse

Also known as: Asmalsund (Brattestø, Pigstens, Pikesten)

Established in 1897, the Asmalsund Lighthouse is a square wooden tower standing 8 meters tall. It features white siding topped with a red lantern roof. The structure is a square skeletal tower covered with wood siding, complete with a gallery and lantern. This lighthouse marks the southwestern tip of Asmaløy, guiding vessels through the Asmalsund passage between Asmaløy and Spjærøy. Its light emits three occultations of white, red, or green every 10 seconds. The focal height reaches 7 meters, providing a geographic range of 9.3 nautical miles. The site is open to the public, though the tower itself remains closed.

Why it matters: The Asmalsund Lighthouse is indispensable for safe passage through the Asmalsund, a critical waterway separating Asmaløy and Spjærøy. Its directional light, shifting between white, red, and green, precisely guides vessels through the channel, preventing groundings and ensuring smooth navigation in this intricate coastal environment.

Light & Optic

Characteristic Signature
Oc (3) White/Red/Green 10s
Flash Type
Occulting
Light Color
White/Red/Green
Flash Count
3 flashes
Interval
10s
Raw Code
Oc(3) WRG 10s
Focal Height
7m
Geographic Range
9.3NM

Construction & History

First Lit
1897

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
8m
Tower Shape
square
Tower Color
white with red lantern roof
Material
wood

Structure: square skeletal tower, covered with wood siding, with lantern and gallery

Location

City
Hvaler
Country
🇳🇴Norway
Region
Østfold
Sea Region
southwestern tip of Asmaløy, marking the entrance to the Asmalsund, the passage between Asmaløy and Spjærøy
Latitude
59.0553°
Longitude
10.9149°

References & Identifiers

Nearest Port
Hvaler(4.4 km)
Admiralty No.
B2258
NGA No.
0208
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Frequently Asked Questions

How do mariners identify Asmalsund Lighthouse at night?+
Asmalsund displays the characteristic Oc (3) White/Red/Green 10s — 3 white/red/green flashes every 10 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 Asmalsund Lighthouse guide vessels into?+
Asmalsund Lighthouse assists vessels approaching 5 nearby ports. The closest is Utgårdskilen at 2.2 NM to the NW. Other ports served include Hvaler (4.3 NM ESE), Skjærhalden (4.3 NM ESE), VIKERKILEN ROAD (7.9 NM N), Fredrikstad (8.2 NM N). Mariners should consult the relevant chart for full approach and pilotage information.
Is Asmalsund Lighthouse still active and maintained?+
Yes, Asmalsund 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 Asmalsund Lighthouse?+
Asmalsund 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 Asmalsund Lighthouse?+
You can track vessels near Asmalsund 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.