The 55-year-old was struck on the junctions of Marshside Road and Hesketh Road, the force said.
The surrounding area of Marine Drive was shut for some time for an initial investigation by police, but has since reopened.
Det Sgt Roper said the 55-year-old’s family have been informed and are being supported by specially trained family liaison officers.
He said: “We have launched an investigation into the man’s death, and it is now a priority for us to get answers on how the collision occurred and my team are working to establish the key facts.
“I know this happened early in the morning, but if anyone saw what happened or were driving through the area just before the incident occurred then please get in touch.
“You may have information or dashcam footage that would be useful to our investigation.”