July arabica coffee was little changed at $1.4590 per lb.
The Brazilian real hit a 2-1/2 month high versus the dollar on Wednesday, deterring farmers and exporters from selling by lowering returns in local currency terms.
The east African country's is Africa's largest coffee exporter and earnings from the crop constitute the second largest source foreign exchange after gold.
Shipments in March rose to 572,839 60-kg bags compared to exports in the same period 12 months earlier, state-run Uganda Coffee Development Authority (UCDA) said in a report.
"We forecast the global market in an 8.5 million tonne surplus in both 2020/21 and in 2021/22. In 2021/22, production will recover in the EU, Thailand and Russia among others," said Fitch Solutions.
Last year the family-owned company recorded sales worth 2.085 billion euros as its retail business only partly compensated for a drop in out-of-home coffee consumption.
Earnings before interest, taxes, depreciation, and amortisation (EBITDA) came in at 253 million euros in 2020, down 13% on 2019.
Brazilian brokers said producers in the world's largest grower were again active sellers in the market after the country's currency weakened to the lowest level in 20 days.