Thrissilery Shiva Temple, one of the ancient temples in the Wayanad district, is believed to be constructed by the Rajas of the medieval times. This temple dedicated to Lord Shiva is closely associated with the Lord Vishnu temple in Thirunelli. All the rites performed for the deceased ones at Thirunelli temple are considered to be incomplete without a visit to the Thrissilery temple at a distance of 19 km. In addition to the main deity, there is a small shrine dedicated to Jala Durga situated in the river tank originating from the Papanasini river of Brahmagiri hills.
With its unique and peculiar architectural structure and serene ambience, devotees find it extremely peaceful for worship. Shivarathri festival that comes around February- March is the annual festival of the temple that is celebrated with grandeur and pomposity. Thrissilery Shiva Temple the twin temple of Thirunelli Temple is widely visited by the devotees for its ancient heritage and culture.