Guinea has a tropical monsoon climate with moist south-westerly winds during the wet season (March to October) and dry north-easterly winds during the dry season (November to February). During the wet season, local vegetation grows rapidly resulting in an accumulation of undergrowth. During the dry season with little rainfall, the shallow topsoil retains little water, leading to ideal conditions for wild fire.
Often described as a ‘water tower’, the Nimba Mountains serve as headwaters to over 40 permanent and seasonal streams. Those in Guinea flow mainly into the Cavally River, which continues into Cote d’Ivoire and then forms the border between Cote d’Ivoire and Liberia before flowing into the Gulf of Guinea. The mountains have many mid-elevation springs that flow year-round, fed by groundwater from high-elevations of the massif.