Production was 113.59 million kgs in November 2012, the Tea Board said in an estimate.
Output in Assam, the largest tea-producing state, decreased 7 per cent to 55.11 million kgs in November from 59.04 million kgs in a year earlier.
In West Bengal, production dropped 8 per cent to 28.14 million kgs from 30.47 million kgs.
Assam and West Bengal are the two largest tea-producing states and their combined output accounted for about 76 per cent of the total in November.
India is the world's second-largest producer and biggest consumer of tea.
The country's tea production increased 3.62 per cent to 1,135 million kgs in 2012-13.