For years, surfing’s holy grail has been the 100-foot wave. Last November, after a low-pressure system produced huge swells off the coast of Portugal, big-wave surfer Garrett McNamara may have come closer to that mark than anyone. According to a statement issued by his sponsors, McNamara rode a 90-foot wave, smashing “the current record [for] the biggest wave ever surfed”—a 77-footer tackled by California’s Mike Parsons in 2008 at Cortes Bank, an open-ocean break 100 miles offshore from San Diego.
McNamara, of Oahu, is a known showman—he once traveled to Alaska to surf the giant ripples produced by calving glaciers—but he’s been playing this one cool, saying only that the wave was “substantially larger” than the handful of 60-to-70-footers he’s ridden in the past. Still, others are crying foul. Ken “Skindog” Collins, another prominent big-wave surfer, is convinced the claim is, if not overblown, at least premature.
“That wave was only 60 feet—65 max,” says Collins, who’s seen the footage that was posted on YouTube and broadcast by CNN. “Personally, I don’t think it was 90 feet, but what he did was brilliant. I guess we’ll find out how big it was at the XXLs.”
Collins is referring to the Billabong XXL Awards, an annual weighing and sifting of the year’s surf achievements, which happens in April. While the wave’s officially recognized height won’t be known until the awards are announced, we used Billabong’s surprisingly rudimentary approach to make our own educated guess. The result? We lean toward believing McNamara.
1. THE METHOD
Bill Sharp, director of the XXL Awards, says his judges will determine the height of McNamara’s wave by using calipers to measure the size of the surfer in a still frame. The judges will then mark the trough of the wave and the lip at its tallest point and count how many McNamaras fit between the two.
2. THE CONVERSION
By our reckoning, the wave reached a height of 17 McNamaras. To convert to feet, Billabong will measure someone who matches McNamara’s height (five feet ten inches) while he’s in a surfing crouch. Thankfully, for our purposes, McNamara knows his crouch height: five feet.
3. THE ESTIMATE
According to our back-of-the-envelope calculation—5' x 17—the wave is approximately 85 feet tall, a new record.
4. THE CAVEAT
Because the footage was shot from a 90-foot sea cliff, we’re seeing more of the wave’s face than if it had been taken at water level. That could make the wave appear larger than it is.