Somalia, officially the Federal Republic of Somalia, is a sovereign country in the Horn of Africa. It is bordered by Ethiopia to the west, the Gulf of Aden to the north, the Guardafui Channel and Somali Sea to the east, and Kenya to the southwest. Somalia has the longest coastline on Africa's mainland. Its terrain consists mainly of plateaus, plains, and highlands. Hot conditions prevail year-round, with periodic monsoon winds and irregular rainfall.