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Green Bay Range Rear Lighthouse

Fl Green 4s🇺🇸Suamico, USOperational

Location & Light Range

About Green Bay Range Rear Lighthouse

This 27-meter cylindrical tower stands on a concrete pier in Green Bay, Wisconsin, north northeast of the Green Bay waterfront. Painted red with a white vertical stripe, its structure incorporates a rectangular daymark. The light emits a green flash every 4 seconds and has a geographic range of 14.7 nautical miles. This range light operates in conjunction with a front light to guide vessels. The site is open to the public by boat, though the tower itself is closed.

Why it matters: As a range rear light, this structure is essential for guiding vessels along a precise course into Green Bay, working together with its front range counterpart to ensure safe passage past Long Tail Point.

Light & Optic

Characteristic Signature
Fl Green 4s
Flash Type
Flashing
Light Color
Green
Interval
4s
Raw Code
Fl Y 4s
Focal Height
27m
Geographic Range
14.7NM

Location

City
Suamico
Country
🇺🇸United States
Region
Wisconsin
Sea Region
Green Bay, off Long Tail Point, north northeast of the Green Bay waterfront.
Latitude
44.5770°
Longitude
-87.9693°

References & Identifiers

Nearest Port
Green Bay(2.0 km)
USCG No.
7-22185

Tower & Structure

Tower Height
27m
Tower Shape
cylindrical
Tower Color
red with a white vertical stripe

Structure: A 27m cylindrical white tower, mounted on a concrete pier, features a rectangular daymark painted red with a white vertical stripe.

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 Green Bay Range Rear Lighthouse at night?+
Green Bay Range Rear displays the characteristic Fl Green 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 green color may indicate a specific sector or warning zone.
Which ports and harbors does Green Bay Range Rear Lighthouse guide vessels into?+
Green Bay Range Rear Lighthouse assists vessels approaching 5 nearby ports. The closest is Green Bay at 4.4 NM to the SSW. Other ports served include De Pere (8.4 NM SSW), Wrightstown (17.8 NM SSW), OCONTO (19.4 NM NNE), Kewaunee (21.3 NM ESE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Green Bay Range Rear Lighthouse still active and maintained?+
Yes, Green Bay Range Rear 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 Green Bay Range Rear Lighthouse?+
You can track vessels near Green Bay Range Rear 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.