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Halfway Rock Light

Location: on Halfway Rock ledge at the entrance to Casco Bay. near Harpswell, ME

Local Marine Forecast.

There are no active watches, warnings or advisories 

About Halfway Rock Light


The location of the light is on Halfway Rock ledge at the entrance to Casco Bay.. The nearest city is Harpswell, ME. The station was first established in 1871. The current lighthouse was first lit in 1871.

The lighthouse is a white conical granite tower.

The tower has a flashing red light at a focal plane height of 76 ft above mean high water. The light has a nominal range of 19 nautical miles. The tower height is 77 ft. The light has a period of 5 seconds.

Open to the Public?: No    Active?: Yes

Identification number: 1-40 (U.S.)
Identification number: J0176 (International)

It was automated in 1975, and it operates continuously. The light station is equipped with a fog horn that sounds two blasts every 30 seconds.

Emergency light of reduced intensity when main light is extinguished.

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 5 second period, the light is on for less than 2.5 then off for more than 2.5.

Halfway Rock Light was listed on the National Register of Historic Places on Mar. 14, 1988, reference number 88000150.

Source: USBeacons

Photo by: Jim Tracy
Source: USBeacons
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