A shocking video shows an RNLI crew battling through turbulent conditions while trying to rescue a swimmer in trouble in rough seas off the coast of Folkestone.

Police, paramedics and the coastguard joined the lifeboat volunteers and a search and rescue helicopter earlier today after a man got into difficulties amid strong winds and huge waves.

Crews were forced to combat gale-force winds, with gusts of 40mph to 55mph as they searched for the swimmer off Mermaid Beach.

Footage from inside the boat shows the nose of the vessel being sent into the air as it rides waves as high as 32ft.

Following a search, crews were informed the man had been able to make his way back to shore.

When he was found, he was treated by paramedics before leaving for home on his own.

A member of the Dover RNLI team tweeted: "We were tasked to reports of a person in distress on the shore in Folkestone.

"Launching in a Force 8-9 and with a swell of three to four metres, the crew stood by in rough conditions to assist.

"Thankfully the casualty was located by Coastguard Rescue Teams and the crew were stood down."

One witness said she saw the helicopter hovering over the coast at about 11.20am today.

"We were walking along Sandgate Promenade and spotted it circling around the edge of the sea," she said.

"Two coastguard vehicles drove past us as well.

"It's really windy today and the sea is very choppy – I've never seen waves like it."

"Please consider if it is safe to go out at all"

A coastguard spokesperson said: "The Coastguard rescue helicopter, Folkestone and Langdon Coastguard Rescue Teams, Dover all weather and Littlestone RNLI Lifeboats attended the scene of an incident earlier today after a man got into difficulty in the sea on Mermaid Beach, Folkestone.

"The man made his own way to shore but was checked over by a paramedic before leaving the scene."

Police confirmed that an officer had stopped to see if aid was required but left the scene shortly after.

The incident is one of a number the coastguard has been forced to respond to already this year, leading to an appeal for residents to be sensible during the winter.

A spokesperson said: "It is vital at this time of year to be prepared before you head to the coast. Please consider if it is safe to go out at all.

"Make sure you check the weather and tides if you decide it is safe to head out, wear appropriate footwear and clothing for your activity, know the sea conditions and stick to coastal paths if you are walking."