Police were called at 5.25am to reports of an unresponsive man on a towpath at Lonsdale Road.
Officers and London Ambulance Service attended.
A man, aged around 40s, was pronounced dead at the scene.
The death is currently being treated as unexpected and the circumstances are under investigation.
If anyone has any information, they should call police on 101 and give reference CAD 978/4OCT.