How long does it take to recover from a partial meniscectomy?

Fairly quickly. A well performed arthroscopy with partial medial meniscectomy does not damage anything and merely removes a painful mechanical tear. As soon as the knee calms down and overall strength has returned, return to activities is safe. This can be anywhere from 3 weeks to 3 months, depending on the person. The majority of recovery is getting back quad strength and range of motion.