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Granite Island Light

 
Location: the northwest end of Granite Island / Lake Superior near Marquette, MI

Local Marine Forecast.


Small Craft Advisory is in effect until August 22 at 7:00PM EDT by NWS
...SMALL CRAFT ADVISORY IN EFFECT FROM 11 AM TO 7 PM EDT TUESDAY... THE NATIONAL WEATHER SERVICE IN MARQUETTE HAS ISSUED A SMALL CRAFT ADVISORY...WHICH IS IN EFFECT FROM 11 AM TO 7 PM EDT TUESDAY. * WIND AND WAVES DURING THE SMALL CRAFT ADVISORY: EXPECT

Latest Condiitions.

About Granite Island Light

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The location of the light is the northwest end of Granite Island / Lake Superior. The nearest city is Marquette, MI. The station was first established in 1868. The current lighthouse was first lit in 1869.

The lighthouse is a gray skeleton tower.

The tower had a flashing white light at a focal plane height of 50 ft above mean high water. The light had a nominal range of 11 nautical miles. The tower height is 96 ft. The light had a period of 6 seconds.

Open to the Public?: No    Active?: No

Identification number: 14700 (U.S.)

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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