The median estimate in the Reuters survey of 13 economists was for manufacturing output to have risen 0.1 percent in September, after a 4.2 percent increase in August from a year earlier.
On a seasonally adjusted month-on-month basis, manufacturing output was seen likely to slip 0.8 percent in September, after a 0.2 percent decline in August.
Singapore's exports rose less than expected in September from a year earlier as sales to Europe contracted and shipments to the United States slowed.