Shreddin' the gnar is taking off during the pandemic ... TMZ Sports has learned surfing has EXPLODED while people try to have fun while social distancing!!!
We spoke with several of the country's biggest surf shops and board manufacturers this week ... and each one told us the demand has been so huge, they can't keep boards in stock!!
"We're back-ordered and can't keep up with the demand," a spokesperson for C-Shapes in Florida says. "The surfboard industry is on fire right now."
Added a rep for Chilli Surfboards in California, "We're selling four times the amount that we usually do.