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Suntholma Lighthouse

Fl (5) White 6s🇫🇮Hamina, FIOperational

Location & Light Range

About Suntholma Lighthouse

Also known as: Suntholma (Suntholmit, Sunholma)

The Suntholma lighthouse is an octagonal concrete tower 7 meters high, topped with a lantern and gallery. Its white structure features a distinctive red horizontal band. The light emits a single white flash every 6 seconds from a focal height of 16 meters, with a geographic range of 12.2 nautical miles. Located on the northwestern point of Suntholmit island, it serves as a guide for westbound vessels transitioning from the inside passage to the Gulf of Finland. The site is open to visitors, though the tower itself is closed.

Why it matters: This lighthouse is indispensable for maritime traffic navigating the complex inside passage of the Gulf of Finland, specifically guiding westbound vessels safely out into the open waters.

Light & Optic

Characteristic Signature
Fl (5) White 6s
Flash Type
Flashing
Light Color
White
Flash Count
5 flashes
Interval
6s
Raw Code
Fl W 6s
Focal Height
16m
Light Range
7.5NM (13.9 km)
Geographic Range
12.2NM

Location

City
Hamina
Country
🇫🇮Finland
Region
Kymenlaakso
Sea Region
Guides westbound vessels leaving the inside passage for the Gulf of Finland, located on the northwestern point of the island of Suntholmit, about 25 km south of Hamina.
Latitude
60.3688°
Longitude
27.3050°

References & Identifiers

Nearest Port
Hamina(10.0 km)
Admiralty No.
C5438.58
NGA No.
13402
ARLHS No.
FIN-027
Wikidata
Q62087081 →

Tower & Structure

Tower Height
7m
Tower Shape
octagonal
Tower Color
white with a red horizontal band
Material
concrete

Structure: octagonal concrete tower with lantern and gallery

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How far offshore can Suntholma Lighthouse be seen?+
With a focal height of 16 meters and a nominal range of 7.5 nautical miles (approximately 13.9 km), Suntholma is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. As a shorter-range light, it primarily serves nearshore and coastal traffic.
How do mariners identify Suntholma Lighthouse at night?+
Suntholma displays the characteristic Fl (5) White 6s — 5 white 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 color may indicate a specific sector or warning zone.
Which ports and harbors does Suntholma Lighthouse guide vessels into?+
Suntholma Lighthouse assists vessels approaching 5 nearby ports. The closest is Lakulahti at 9.8 NM to the NNW. Other ports served include Klamila (9.9 NM NNE), Hamina (Fredrikshamn) (11 NM NNW), Summa (11.3 NM NNW), Poitsila (11.6 NM NNW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Suntholma Lighthouse still active and maintained?+
Yes, Suntholma 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 Suntholma Lighthouse?+
Suntholma 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 Suntholma Lighthouse?+
You can track vessels near Suntholma 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.