Three fire engines from Blackpool and Fleetwood were called to an incident near Bulkhead Drive at around 4pm on Thursday (June 15).
The fire involved a boat on a sandbank of the River Wyre.
Firefighters used hose reels and pumps to extinguish the flames.
A spokesman for Lancashire Fire and Rescue Service said: “The police have been called to assist with the fire investigation.”
No injuries were reported by the fire service.