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Petäis Lighthouse

Fl White/Red/Green🇫🇮Pargas, FIOperational

Location & Light Range

About Petäis Lighthouse

This square concrete tower, standing 5 meters high, is located at the west end of Västra Petisholmen on the south side of a ship channel. Its lantern and gallery sit atop the structure. The light emits three distinct colors: white, red, and green, cycling every 3 seconds. It has a focal height of 7 meters and a geographic range of 9.3 nautical miles. The site of the lighthouse is open to visitors, though the tower itself is closed. The nearest port is Nagu, 4.4 kilometers away.

Why it matters: The lighthouse provides critical directional light signals, changing color based on approach, which allows vessels to accurately navigate this specific waterway within the Finnish archipelago.

Light & Optic

Characteristic Signature
Fl White/Red/Green
Flash Type
Flashing
Light Color
White/Red/Green
Raw Code
Fl WRG 3s
Focal Height
7m
Light Range
7.1NM (13.1 km)
Geographic Range
9.3NM

Location

City
Pargas
Country
🇫🇮Finland
Region
Southwest Finland
Sea Region
Located at the west end of Västra Petisholmen, on the south side of the ship channel.
Latitude
60.2388°
Longitude
21.7971°

References & Identifiers

Nearest Port
Nagu(4.4 km)
Admiralty No.
C4781.6.
Wikidata
Q62032295 →

Tower & Structure

Tower Height
5m
Tower Shape
square
Tower Color
white
Material
concrete

Structure: square 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 Petäis Lighthouse be seen?+
With a focal height of 7 meters and a nominal range of 7.1 nautical miles (approximately 13.1 km), Petäis 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 Petäis Lighthouse at night?+
Petäis displays the characteristic Fl White/Red/Green. 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 Petäis Lighthouse guide vessels into?+
Petäis Lighthouse assists vessels approaching 5 nearby ports. The closest is Nauvo (Nagu) at 4.9 NM to the SE. Other ports served include Korppoo (Korpo) (8.1 NM WSW), Rymättylä (Rimito) (8.9 NM NNE), Houtskari (Houtskär) (12.4 NM W), Velkua (13.1 NM NNW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Petäis Lighthouse still active and maintained?+
Yes, Petäis 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 Petäis Lighthouse?+
Petäis 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 Petäis Lighthouse?+
You can track vessels near Petäis 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.