Thailand's customs-cleared exports in November fell 7.39% from a year earlier, after falling 4.54% the previous month, the commerce ministry said on Monday.
November's export numbers came in worse than a Reuters poll forecast for a decrease of 4.5% in shipments, a main driver of Thai growth.
Shipments to China rose 2.3% in November from a year earlier, while those to the United States dropped 2.6%, a ministry official said.
Imports in November contracted 13.78% from a year earlier, after falling 7.57% the previous month.
The poll had forecast a fall of 6.8% in imports last month.
November's trade surplus amounted to $0.55 billion, versus a forecast for $0.19 billion deficit, and October's surplus of $0.51 billion.
In January-November, exports contracted 2.77% from a year earlier and imports fell 5.22% during the period.