Grinna Lighthouse is a coastal lighthouse

Lighthouse

A lighthouse is a tower, building, or other type of structure designed to emit light from a system of lamps and lenses or, in older times, from a fire, and used as an aid to navigation for maritime pilots at sea or on inland waterways....

 in the municipality of Vikna

Vikna

Vikna is a municipality in Nord-Trøndelag county, Norway. It is part of the Namdalen region. The administrative centre of the municipality is the village of Rørvik. Other villages in Vikna include Austafjord, Garstad, and Valøya.-General information:...

 in Nord-Trøndelag

Nord-Trøndelag

is a county constituting the northern part of Trøndelag in Norway. As of 2010, the county had 131,555 inhabitants, making it the country's fourth-least populated county. The largest municipalities are Stjørdal, Steinkjer—the county seat, Levanger, Namsos and Verdal, all with between 21,000 and...

, Norway

Norway

Norway , officially the Kingdom of Norway, is a Nordic unitary constitutional monarchy whose territory comprises the western portion of the Scandinavian Peninsula, Jan Mayen, and the Arctic archipelago of Svalbard and Bouvet Island. Norway has a total area of and a population of about 4.9 million...

. It was established in 1904 and automated in 1987. Grinna lighthouse stands on the islet of Grinna in the South Gjæslingan island group on the north side of the Folda

Folda, Nord-Trøndelag

Folda or Folla is a firth and a fjord in Nord-Trøndelag county, Norway, within the municipalities of Flatanger, Namsos, Fosnes, and Nærøy. The large wide firth is about long which then narrows into a fjord which is about long. The narrower fjord part of Folda is often called the Foldfjorden or...

fjord. The 19 metres (62.3 ft) high red tower emits a light every six seconds. The white occulting light flashes every six seconds, and it can be seen for about 12.5 nmi (23.2 km; 14.4 mi).