The line-up of vessels to load sugar in Brazil's ports declined to 53 from 54 last week, shipping agent Williams said Thursday.
A two-day strike by truckers which ended Tuesday had little impact.
Brazil's main center-south sugarcane region is in the midst of a rain-plagued harvest.
In a weekly report, Williams said 35 vessels were lined up in the southern port of Santos, down from 36 last week.
At Paranagua there were eight ships, the same as last week, and at Vitoria there were four, likewise the same number of ships as last week.
Santos accounted for 72 percent of sugar tonnage being loaded in Brazil's ports, Paranagua garnered 14 percent and Vitoria 6 percent.