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The poll's median forecast was a for exports to grow 8.0 percent in March from a year earlier.
Exports, a key driver of economic growth in Thailand, rose 10.3 percent on year in February.
The commerce ministry is targeting an export growth of 8 percent this year, after a 9.9 percent increase in 2017, despite a strong baht.
Imports in March may have risen 11.6 percent from a year earlier, after jumping 16.0 percent in February, the poll showed.
Thailand likely recorded a trade surplus of $700 million in March, according to the poll, following a surplus of $808 million in February.