Maritime Guinea (French: Guinée Maritime), also known as Lower Guinea, is one of the four natural regions of Guinea. It is located in the west of the country, between the Atlantic Ocean and the Fouta Djallon plateau. Conakry, Guinea's capital and largest city, is located in the region.
Maritime Guinea includes the Atlantic coast and coastal plain. The coast is indented with rias, or drowned river valleys, that form inlets, tidal marshes, mangrove forests, and estuaries, and numerous offshore islands. Conakry occupies Tombo Island and the adjacent Kaloum Peninsula.
The region is a gentle coastal plain, between 50 and 80 km (30 and 40 miles) wide, and wider in the south than the north. the Fouta Djallon plateau rises from the plain, and several rivers, including the Fatala, Konkouré, and Kolenté, originate in the Fouta Djallon and flow west to empty into the Atlantic.
The climate of Guinea is tropical, with a six-month dry season (November through March) and a wet season (April through October). The heaviest rainfall comes in June, with the arrival of the Inter-Tropical Convergence Zone (ITCZ).
Average rainfall at Conakry is about 4,300 mm (170 inches) a year, and the average annual temperature is about 27 °C (low 80s F).
- Guinean forest-savanna mosaic covers most of the region, extending north into Guinea Bissau and Senegal, and east through northern Sierra Leone and Upper Guinea.
- Western Guinean lowland forests occupies the area around Conakry and south, extending into coastal Sierra Leone, Liberia, and western Côte d'Ivoire.
- Guinean mangroves, in the coastal estuaries. Enclaves extend north into Guinea Bissau, Gambia and Senegal, and southeast through Sierra Leone, Liberia, and Côte d'Ivoire.