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Gravelly Shoal Light

Location: Saginaw Bay / Lake Huron near Standish, MI

Local Marine Forecast.

There are no active watches, warnings or advisories 

Latest Condiitions.

About Gravelly Shoal Light


The location of the light is Saginaw Bay / Lake Huron. The nearest city is Standish, MI. The station was first established in 1939. The current lighthouse was first lit in 1939.

The lighthouse is a white square tower on cylindrical base.

The tower has a flashing red light at a focal plane height of 75 ft above mean high water. The light has a nominal range of 10 nautical miles. The tower height is 65 ft. The light has a period of 6 seconds.

Open to the Public?: No    Active?: Yes

Identification number: 7-10540 (U.S.)

HORN: 1 blast ev 30s (3s bl). Operates continuously.

A 'flashing' light is a light in which the total duration of light in a period is shorter than the total duration of darkness and the appearances of light (flashes) are usually of equal duration. So in the 6 second period, the light is on for less than 3 then off for more than 3.

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