General weather conditions:
The rainy season starts in March and lasts until end of October, with two peak rainy periods in June and end of September. In August there usually is a spell of dry weather of 3 to 4 weeks. The dry season begins in late October and lasts till early March. During the very hot and dry period between early December and late February north-easterly “Harmattan” winds blow dust from the Sahara to the Gulf of Guinea. Large amounts of dust in the air cause heavy fog like conditions with attendant delays in vessel movements and a large number of flight cancellations.