Hi, There are lots of places in and around Pondy to visit.Specifically if you are looking to visit Pondy then 4 days would be sufficient to see the places nearby also. 2.5 days - Visit beaches, Aurobindo Ashram, plenty of temples ,some shopping + places nearby.
2 days is more than sufficient to explore Pondicherry. in case you are interested, you can check out our event to Pondicherry by clicking on this link: https://monksonwheels.com/tour/pondicherry-tours/