Australia's world champion Nina Kennedy has continued her outstanding form by soaring to a national pole vault record at the Zürich Diamond League meet.

Fresh from sharing the gold medal with Katie Moon at the World Athletics Championships in Budapest, Kennedy scored a victory over her American rival with a record-breaking effort of 4.91 metres in a rather unusual setting.

The pole vault was staged separately on the eve of the world-famous Diamond League Weltklasse main program at Letzigrund Stadium, organised on a specially constructed track in the Swiss city's Hauptbahnhof, the central railway station.

Kennedy was cheered on by a large crowd of commuters watching from a makeshift tribune and around the landing mat while trains were pulling in and out of platforms just metres away.

Her winning clearance was one centimetre higher than what she and Moon achieved in Budapest last week.

Not only was it the best vault by any woman in 2023 but it was also a meeting record, which only added to the growing list of remarkable achievements by Kennedy, who is currently the Commonwealth Games, world and Diamond League champion.

"I am really surprised, and I am so happy. This is all my dreams come true, I love Zürich," Kennedy said.

Kennedy will fly home to Australia before competing in the Diamond League final in Eugene, Oregon on September 16 and 17, the event she won last year.

"Having a week off after the worlds (world championships), I just wanted to go out there and have fun and I think because the pressure was off, I was able to just focus on doing what I love," she said.