Broadcaster Paul Holmes will be back on the airwaves this month, three months after open-heart surgery.

Newstalk ZB has announced that Holmes' first Saturday morning show will be broadcast on September 22.

The 62-year-old Weekend Herald columnist, Newstalk ZB radio host and Q+A television presenter was diagnosed with hypertrophic cardiomyopathy, a usually genetic condition in which the heart muscle thickens to such an extent it impedes and blocks bloodflow.

Following a four-hour open-heart operation in Auckland in June to remove a blockage and carry out remedial work on his heart, Holmes was put on life support in an induced coma to help his recovery.

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He returned to his Hawkes Bay home in July to continue recuperating.

In June he told the Herald the heart operation "had been a real wake-up. I don't think we realised how much my heart had failed until the last two weeks."