Vayaskara Dharmasastha temple is located in Kottayam town, Kerala. The annual temple festival is observed in Medam month for six days.
Vayaskara Dharmasastha temple is one among the 108 Shiva temples in Kerala. The temple is known as Kottayam Kavu in the Thottam Pattu.
Sastha is believed to have showed his presence in a Shila Kandam in the courtyard of Vayaskara Illam.
The Upa Devatas worshiped in the temple are Shiva and Dhanvantari murti.
The temple belongs to Vayaskara Illam which is famous as one among the Ashtavaidya families in Kerala.