Poredam Mahadevar temple is located at Poredem near Chadayamangalam in Kollam district, Kerala. The temple is dedicated to Shiva or Mahadeva. The annual Avittam Thirunal festival in the temple is held in Meda Masam (April – May).
This is an ancient and powerful temple in the region. The temple is built as per Kerala temple vastu shastra. The shrine has a kodimaram, chuttambalam, namaskara mandapam, shrines of upa devatas, pond and a chathura sreekovil. The upa devatas worshipped here include Bhagavathy and Ganapathi.
The annual festival in the temple is famous for ezhunnallathu, caparisoned elephants, traditional temple performing art forms and melam. Shaiva tantric pujas and rituals including kalasham, dhara, and homam are part of the festival.
The shrine also observes Pongala, Mahashivratri and Pradosham vratam.