Emergency services were called to the tragic incident at just after 10.10am today (July 20).
A Sussex Police spokesman said: "Emergency services went to the beach at Camber Sands near Rye, just after 10.10am on Saturday (July 20 ), after a report that a 47-year-old man had sustained serious injuries by falling on to a wall while attempting to kite surf.
"Sadly he was confirmed dead at the scene. His death is being treated a tragic accident and next of kin have been informed."
The man was not from the local area, police said.
A spokesman added that the coroners officer was continuing enquiries.