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Chasing world's largest waves for chance at history

Patricia De Melo Moreira / AFP - Getty Images

Garrett McNamara rides a wave during a surf session at Praia do Norte in Nazare on Jan. 30. McNamara currently holds the world record for the biggest wave surfed after riding a 78-foot breaker in Nazare, Portugal, on Nov. 1, 2011 but on Jan. 28, 2013 was thought to have gone better at the same location.

Patricia De Melo Moreira / AFP - Getty Images

Garrett McNamara waits for a wave during a surf session at Praia do Norte in Nazare on Jan. 30.

Hawaii's Garret McNamara may have broken his own world record by surfing this estimated 100-foot wave in Portugal. NBCNews.com's Dara Brown reports.

Not one to turn away from big waves, surfer Garrett McNamara went back to the shores of Nazare, Portugal, to continue his quest for the world’s largest wave. A day earlier, McNamara possibly set a new record for surfing an estimated 100-foot wave, but the exact size of the wave is yet to be officially confirmed. 

PHOTO: Enormous wave dwarfs surfer Garrett McNamara along coast of Portugal

"Personally, it was very challenging. You just have to stay in the moment, stay focused on what you're doing,” said McNamara to SurferToday.com.

Below are photos of what may go down in history as the day McNamara surfed a 100-foot wave.

Francisco Seco / AP

Garrett McNamara rests after a surf session at Praia do Norte beach in Nazare, Portugal, on Jan. 29.

Rafael Marchante / Reuters

Big-wave surfer Garrett McNamara jokes with his colleague Kealli Mamala before a surf session at Praia do Norte in Nazare Jan. 29.

Rafael Marchante / Reuters

Big-wave surfer Garrett McNamara drops in on a large wave at Praia do Norte in Nazare on Jan. 29.

Francisco Seco / AP

Garrett McNamara meets media before a surf session in Nazare, Portugal, on Jan. 29.

Rafael Marchante / Reuters

Big-wave surfer Garrett McNamara looks at the sea with his colleague Kealli Mamala before a surf session at Praia do Norte in Nazare, on Jan. 29.

Patricia De Melo Moreira / AFP - Getty Images

Hawaiian surfer Garrett McNamara carries his surfboard as he leaves the beach after a surf session at Praia do Norte in Nazare on Jan. 29.