Actually this is a Saiva temple with Lord Siva bearing the name Sri Navaneetheswara. But the main deity is Lord Subrahmanya called Singaravelavar. Sage Vasishta made a sivalinga made of butter obtained from the milk of the divine cow Kamadhenu for worship. After puja, the sivalinga could not be shifted and got stuck and hence the name sikkal in Tamil for this place. This temple was worshipped by sages Vasishta, Viswamitra, wish-granting cow Kamadenu and Emperor Muchukunda of Deva Loka. Saints Sambandhar and Arunagirinathar have sung in praise of the Lord Sikkal Singaravelavar.
The name of the goddess in the standing posture here is Velnedunganni. Ganapati, Mahalakshmi, Nataraja, the sixty three Nayanmars, Bhairava, Surya and Chandra are also having sannadhis at the respective places as per agamic standards. The sthala vriksha (sacred tree) here is jasmine. There are three holy tanks for this temple namely Ksheera (ie. milk), Gaya and Lakshmi Tanks.
During the Tamil month of Arpasi, Skanda Shashti is celebrated in a grand manner for the main ruling deity Singaravelavar. Tradition tells us that the Lord received the Vel at Sikkal and killed Surapadman at Tiruchendur the next day. During Skanda Shashti, Lord Singaravelavar will receive the Vel one day prior to Surasamharam from his mother to destroy the demon Surapadman. After receiving the Vel even today, one will find Muruga's face perspiring, which is a miracle. The Singaravelavar is in the form of utsavamurti with his consorts Valli and Devayanai, showering his divine grace.
