A father and son have been rescued from a river near Hastings after they were trapped under a jet boat online marketing.

The jet boat rolled on top of a 21-year-old man and his father about 3.45pm on Sunday, a Lowe Corporation Rescue Helicopter spokeswoman said.

The men were found on Ngaruroro River about 9km north of Maraekakaho wine tasting.

The 21-year-old was more seriously hurt, suffering suspected back, neck and abdominal injuries.

Both men were flown to Hawke's Bay Regional Hospital spa hong kong.