The Vaikom Mahadeva Temple is a temple for the Hindu god Shiva in Vaikom, Kerala. The temple, along with Ettumanoor Siva Temple, Kaduthuruthy Thaliyil Mahadeva Temple is considered a powerful trisome. The belief is that if a devotee worships at these three temples before ‘Ucha pooja’, all the wishes are fulfilled. The Vaikom Mahadeva temple is one of the few temples which is held in reverence by both Shaivaites and the Vaishnavaites. Vaikom’s Shiva is fondly called Vaikkathappan. The Shiva Linga here is believed to be from the ‘Treta yuga’ and considered as one of the oldest temples in Kerala where pooja has not been broken since inception.

Vaikom Ashtami
The Vaikom temple is famous for the Vaikom Ashtami, one of its main festivals, which is held in November–December. The exact date of the festival is determined by the Malayalam calendar. Vaikathashtami is celebrated on the day of Krishna Ashtami. The legend behind this festival is that years ago a saint man prayed to god siva for years after many years God siva and his wife parvathy devi appeared in front of him. It is believed that god Siva appeared in front of him in the day of Krishna Ashtami. So as a memory of this vaikathashtami is celebrated. It is the festival extends for 12 days. 12th day is vaikathashtami.