The lack of electoral success of the Bharatiya Janata Party (BJP) in the South Indian state of Kerala is often explained through the idea of Kerala ‘exceptionalism’, a broad term used to explain the unique historical, political, and developmental trajectory of the state. However, such explanations do not adequately address the systematic and concerted attempts by Hindu nationalist organizations to transform the cultural sphere of Kerala into a fertile ground for its future electoral politics. Through an ethnographic study of three Hindu nationalist organizations in the civil society sphere of Kodungallur, a multi-religious town in central Kerala, this article explores the politics and implications of their cultural interventions. The article argues that, peeved by an ‘absent Hindu atmosphere’ in Kerala, these organizations are trying to construct new forms of sociality and subjectivity and a grassroots public sphere embedded in Hindu nationalist ideology in Kodungallur. Often described by these organizations as ‘apolitical’ and ‘cultural’, these interventions are indeed a critique of the Kerala public sphere which is characterized by religious pluralism and secular sociality. Hence, the attempt to create a ‘Hindu atmosphere’ by these organizations is a deeply political endeavour aimed at creating an exclusivist Hindu hegemony in the cultural sphere, which they assume will pave the way for their electoral hegemony in Kerala in the long run.