Host Adam Henson filmed a segment in North Devon for the BBC show where he met with a cattle farmer called Wayne.
The 51-year-old appeared shocked to learn cattle were found on the coastline and was even more stunned to find out about their activities on the beach.
Wayne surprised the presenter and viewers as he revealed he once saw a steer in the sea going for a swim.
He admitted he was shocked to see the animal in the a different type environment and attempted to save it case it would drown.
But after swimming around for an hour, the cow body even bodysurfed its way back to shore.
Wayne explained: “I happened to be on the beach and a neighbour’s steer got loose.The first thing he did was swim out!
“He swam around the bay for an hour, and I’ve kept cows all my life and I had no idea they could swim.
“Once he got in his stride he was stretching out and everything. He swam around the bay for an hour, and just to top it all he body surfed back into sure.”
The surprising revelation resulted in viewers of the hit BBC One show flocking to Twitter to express their amusement at the story.
One excited viewer wrote: “Swimming cows on #countryfile Awesome!!
“Swimming and surfing cows…wonderful. #countryfile,” wrote another.
One user asked: “#Countryfile can the public go surfing on the cows now then?”
“Cows sneaking off for a swim in the sea. Now that’s my kind of thing,” said one viewer.
Countryfile continues on BBC One next Sunday at 7pm.