The moisture sorption isotherms of various tea samples presented a sigmoid shape and belong to type II of BET classification. The experimental results illustrated that EMC increased with decreasing temperature, at constant ERH. Furthermore, at constant temperature, the EMC increased with increasing ERH. Various models were tested for their ability to fit the experimental sorption data. The sorption data werevin good agreement with popular sorption models like Peleg, modified Henderson and GAB equations.However, the Peleg model could be found best to describe the sorption isotherm at all the temperatures studied for both instant green tea powder and green tea granules. The isosteric heat of sorption curve showed a regular fall with increasing moisture content and approached the heat of vaporization of free water at higher moisture content.