Matt Stanley and Andrew Flounders were surfing off Amble in Northumberland when the seal jumped on Stanley's surf board.
"It was a once-in-a-lifetime experience," said 23-year-old Stanley. "We had been in for about 45 minutes when the seal came along. I've seen them there before but they are usually far away.
"This one nudged Andrew's foot in the water and started getting curious."
The seal climbed onto their boards but the youngster struggled to stay aboard for too long. The two surfers are seen in the video helping the seal onto their boards but the pup keeps falling off.
"It kept sliding off, but every time you caught a wave it would surf in on the white water."
The seal stayed with the two surfers for about an hour and swam with them as they took in some of the waves.
Video courtesy and copyright of Andrew Flounders and Matt Stanley.