Fleetwood Coastguard revealed the details of the rescue by inshore lifeboat on social media.
They posted on Facebook that the team was paged at 04:20 (Friday July 30) to reports of person in difficulty in the sea at Blackpool North Pier.
They said: "HM Coastguard Fleetwood , HM Coastguard Lytham and RNLI Blackpool began a search with Coastguard Rescue Helicopter 936 and RNLI Fleetwood en route to assist.
"A person was recovered from the sea by one of the ILBs and received emergency first aid while being transferred to North West Ambulance Service NHS Trust.
Video shows man in van wielding weapon in Preston city centre fight
Dramatic reduction in speed limit on major route into Preston through South Ribble
Lewis Turner inquest: moped rider "travelling at motorway speeds" on residential New Longton road and without fastened helmet before fatal crash
Real Housewives of Cheshire: former star of hit TV show set to visit Chorley boutique
Lancashire Police investigate after man found critically injured outside Preston’s Harris Museum
"They then received advanced care before being taken to Blackpool Victoria Hospital.
"Their condition is not known at this time."