Swimmer missing in WA's far north

A man, believed to be in his 30s, has gone missing while swimming in far northern Western Australia.

He was on a private boat with a group of people on the Ord River in Kununurra on Sunday morning when he jumped into the water from the high point in the Carlton Gorge, surfaced for a short time then disappeared under water.

Despite an initial search by the party he could not be found. Kununurra police and SES volunteers are using two boats to look for him.