Arumanoor Sri Nainaar Deva temple is located at Arumanoor near Poovar in Thiruvananthapuram district, Kerala. The shrine is dedicated to Shiva and is associated with Sri Narayana Guru. The 10-day annual festival in the temple is held in Makara masam (January - February).
This is believed to be ancient temple and might have some connection to the ancient Sangam period. The shrine was in a dilapidated condition before it was renovated under the leadership of Sri Narayana Guru in kollavarsham 1088.
The shrine is also dedicated to Goddess Parvati.
Shiva is worshipped here as
Nayanar and Goddess Parvati is worshipped as Nachiyar.
The other important festivals observed in the temple are Mahashivratri, Navratri and Thrikarthika.