Malin Head () is the most northerly point of mainland Ireland, located in the townland of Ardmalin on the Inishowen peninsula in County Donegal. The head's northernmost point is called Dunalderagh at latitude 55.38ºN. It is about north of the village of Malin. The island of Inishtrahull is further north, about northeast of the headland. Malin Head gives its name to the Malin sea area. There is a weather station on the head, which is one of 22 such stations whose reports are broadcast as part of the BBC Shipping Forecast. A tower built in 1805 is on Altnadarrow, also known locally as the Tower Hill. Ptolemy's Geography (2nd century AD) described a point called Βορειον (Boreion, "the northern") which probably referred to Malin Head. Locality To the northeast Inistrahull Island can be seen. The first lighthouse on the island was put into operation in 1813, and the light flashes every 30 seconds. Below Altnadarrow to the east lies Ballyhillion beach, a unique raised beach system of international scientific importance. The very distinct shorelines show the changing relationship between the sea and the land from the time the glaciers began to melt, some 15,000 years ago. At that time County Donegal was depressed by the weight of an immense ice sheet, so the level of the sea, relative to today's shore, was up to 80 feet higher than today. Scenes from Star Wars: The Last Jedi were filmed in Malin Head. Weather station Weather reports commenced in Malin Head in 1885. In 1955 a new Meteorological station was built beside the coastguard station by Met Éireann. Hourly data points, which include sunshine, wind, rain etc, are recorded here. Climate Malin Head has a temperate oceanic climate (Köppen class Cfb). As a result of its exposed coastal location, high winds and storms are a notable presence for much of the year. Summers are typically mild bordering on cool, while winters have cool days and crisp nights. Wartime use A military watchtower was built on Altnadarrow in 1805, during the Napoleonic Wars. Around 1902, a signal station used by the Marconi Company was built close to the old Napoleonic watchtower. Both of these buildings still stand. During The Emergency (World War II), the Government of Ireland allowed the British Government to site two radio direction finders on Malin Head. This top-secret operation was mentioned in The Cranborne Report. The RDF equipment was