More than 100 surfers broke the Guinness World Record for the "Most surfers riding the same wave" in Cape Town on Sunday, Kahuna Promotions said.

The record was made at the Earthwave beach festival.

"We estimated that there were more than 120 surfers on the fifth of the seven waves surfed at Muizenberg during Earthwave,' said Kahuna founder Paul Botha in a statement.

"However, the photographic evidence we have so far shows that there were 103 on the same wave, which is enough to overtake the record of 100 set by Earthwave Brazil in Santos last year," Botha said.

According to the report on IOL, it was initially a bit of a struggle to get all the surfers on the one wave. "The first wave was chaos. Some yelled "go, go", others said, "no, no - back wave"."

Earthwave's local organiser, Paul Botha, told IOL that the secret to reaching success is to not have the surfers clumped together. "They need to stay in a line, spread out along the beach, so that when they turn and paddle, they don't paddle into each other."

The Earthwave festival is an annual event to promote awareness of climate change and sustainable lifestyles.

The images and video footage would be sent to Guinness to have the record updated and ratified.