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Grass Island Lighthouse

Fl Green 1s🇺🇸USOperational

Location & Light Range

About Grass Island Lighthouse

Also known as: Grass Island (Mount Desert Rock Replica)

The Grass Island Lighthouse, built in 2007, is a 6-meter cylindrical tower constructed of unpainted gray concrete. It features a black lantern and gallery at its top. This active aid to navigation emits a single green flash every second. The lighthouse stands on the California side of Lake Havasu, south of Havasu Island. Accessible only by water, the site is open to visitors, though the tower itself remains closed.

Why it matters: This lighthouse provides a distinct green flashing light that aids boaters navigating the waters of Lake Havasu, particularly south of Havasu Island, contributing to safety in a popular recreational area.

Light & Optic

Characteristic Signature
Fl Green 1s
Flash Type
Flashing
Light Color
Green
Interval
1s
Raw Code
Fl G 1s

Construction & History

Year Built
2007

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
6m
Tower Shape
cylindrical
Tower Color
gray concrete
Material
concrete

Structure: A 6m round concrete block tower with lantern and gallery, unpainted gray concrete with a black lantern.

Location

Country
🇺🇸United States
Region
California
Sea Region
Lake Havasu, off the California side of the lake south of Havasu Island
Latitude
34.4466°
Longitude
-114.3375°

References & Identifiers

Nearest Port
National City(176.1 km)
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Frequently Asked Questions

How do mariners identify Grass Island Lighthouse at night?+
Grass Island displays the characteristic Fl Green 1s. 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.
Is Grass Island Lighthouse still active and maintained?+
Yes, Grass Island 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 Grass Island Lighthouse?+
You can track vessels near Grass Island 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.