Snana or medicated bath as part of Paschatkarma or post treatment care in Ayurveda. In Ayurvedic texts it is recommeded to have a daily bath after an Abhyanga or self-administered whole body oil massage. And warm water is preferred for having bath after Abhyanga.  Please avoid bathing at noon, while the climate is hot. You can have baths either in the morning or in the afternoon, before sunset. Bathing immediately after meals is harmful.