Police were called by paramedics to a residential address on Clyde Road to reports of a stabbing at 7.40am on Sunday, October 25.
A 29-year-old was found suffering stab wounds and, despite efforts to resuscitate him, was pronounced dead at the scene. His next of kin have been informed.
A 35-year-old woman was arrested on suspicion of murder at the scene and is currently in custody at a south London police station.
A crime scene remains in place at the address.
A Metropolitan Police spokesman said a post-mortem examination will be held in due course.
It comes in a weekend of bloodshed where a 17-year-old boy was knifed to death in Walthamstow on Friday night.
Anyone with information is asked to call police via 101 quoting reference Cad 1827/25Oct. Alternatively, to remain anonymous contact Crimestoppers on 0800 555 111.