The climate is tropical, with a wet season from June to October. The dry season is from December to April, with hot winds from the interior. Humidity is high from July to September. Temperatures vary with altitude and distance from the coast.

Tropical lightweight cotton clothes and raincoat for the rainy season.

Guinea-Bissau (formerly Portuguese Guinea) is located in West Africa, and is bounded to the north by Senegal and to the south and east by the Republic of Guinea. It encompasses the adjacent Bijagós Islands and the island of Bolama. The country rises from a coastal plain broken up by numerous inlets through a transitional plateau to mountains on the border with Guinea. Thick forest and mangrove swamp cover the area nearest the Atlantic Ocean. Savannah covers the inland areas.