Kenya is the world's leading exporter of black tea. The crop is a main source of foreign exchange for the east African economy, together with horticultural products and tourism.
Prices for Best Broken Pekoe Ones (BP1s) sold at $2.05-$3.16 per kg compared with $2.16-$3.28 per kg last week.
Best Brighter Pekoe Fanning Ones (PF1s) fetched $2.12-$2.61 per kg from $2.10-$2.54 per kg the last sale.
Tea Brokers said 23.01 percent of the 165,603 packages, or 10.55 million kg, remained unsold. Last week 12.08 percent of the 166,628 packages - or 10.68 million kg - on offer were left unsold.
Most of the tea offered at the Mombasa auction is from Kenya, but tea from Uganda, Tanzania, Rwanda, Burundi and other regional producers is also sold.