The Gulf of Tadjoura is a gulf

Headlands and bays

Headlands and bays are two related features of the coastal environment.- Geology and geography :Headlands and bays are often found on the same coastline. A bay is surrounded by land on three sides, whereas a headland is surrounded by water on three sides. Headlands are characterized by high,...

 or basin of the Indian Ocean

Indian Ocean

The Indian Ocean is the third largest of the world's oceanic divisions, covering approximately 20% of the water on the Earth's surface. It is bounded on the north by the Indian Subcontinent and Arabian Peninsula ; on the west by eastern Africa; on the east by Indochina, the Sunda Islands, and...

 in the Horn of Africa

Horn of Africa

The Horn of Africa is a peninsula in East Africa that juts hundreds of kilometers into the Arabian Sea and lies along the southern side of the Gulf of Aden. It is the easternmost projection of the African continent...

. It lies south of the straits of Bab-el-Mandeb

Bab-el-Mandeb

The Bab-el-Mandeb meaning "Gate of Grief" in Arabic , is a strait located between Yemen on the Arabian Peninsula, Djibouti and Eritrea, north of Somalia, in the Horn of Africa, and connecting the Red Sea to the Gulf of Aden...

, or the entrance to the Red Sea

Red Sea

The Red Sea is a seawater inlet of the Indian Ocean, lying between Africa and Asia. The connection to the ocean is in the south through the Bab el Mandeb strait and the Gulf of Aden. In the north, there is the Sinai Peninsula, the Gulf of Aqaba, and the Gulf of Suez...

, at 11.7°N 43.0°E. Most of its coastline is the territory of Djibouti

Djibouti

Djibouti , officially the Republic of Djibouti , is a country in the Horn of Africa. It is bordered by Eritrea in the north, Ethiopia in the west and south, and Somalia in the southeast. The remainder of the border is formed by the Red Sea and the Gulf of Aden at the east...

, except for a short stretch on the southern shore, which is part of the territory of Somalia

Somalia

Somalia , officially the Somali Republic and formerly known as the Somali Democratic Republic under Socialist rule, is a country located in the Horn of Africa. Since the outbreak of the Somali Civil War in 1991 there has been no central government control over most of the country's territory...

.

Ports on the Gulf of Tadjoura include Obock

Obock

Obock is a small port town in Djibouti. It is located on the northern shore of the Gulf of Tadjoura, where it opens out into the Gulf of Aden. The population in 2003 was about 8,300 inhabitants....

, Tadjoura

Tadjoura

Tadjoura is the oldest town in Djibouti and the capital of the Tadjourah region. Lying on the Gulf of Tadjoura, it is home to a population of around 25,000 inhabitants.Tadjoura has an airstrip and is linked by ferry with Djibouti City...

 and Djibouti City.