WAIMEA BAY, Oahu– A surfing competition that requires unique surfing conditions could take place on the north shore of Oahu on Sunday.

The surfing competition requires at least 40-foot waves to advance by 8 a.m. on competition day, according to KHON2, and consists of two rounds with five heats in each round.

“The Eddie Aikau Big Wave Invitational” honors the life and legacy of Eddie Aikau, a waterman and lifeguard on the North Shore of Oahu who rescued countless swimmers from the rough and dangerous surf, according to the Eddie Aikau Foundation.

Waves of 40 to 50 feet were expected on Oahu’s north shore Sunday.

(surf line)

A high surf warning is in effect for the North Shore of Oahu until 6 a.m. Hawaii time Monday. Waves of between 40 and 50 feet were expected to peak around midday local time on Sunday.

Thousands of people gathered to watch the competition, which saw sunny skies and temperatures around 30 degrees.

According to KHON2, “The Eddie” has only performed 11 times since its start in 1984 because the competition requires such big waves.