McNamara is said to have broken his own world record for the largest wave surfed when he caught a wave reported to be 100ft (30 metres) off the coast of Nazaré, Portugal.

His ride is yet to be officially verified but if it is, McNamara will have smashed his previous record of 24m, set in Nazare in 2011.

“It’s amazing we get to do what we do, I am so grateful,’ McNamara said in 2011 when his record was confirmed at a ceremony in California.

“I didn’t want to get caught up in it all, but I have to tell you the truth, when they announced my name I got a bigger rush than probably on all the waves I rode this year.”