UN report says there's a 98 per cent chance one of the next five years will be the hottest ever

A new UN report forecasts record-breaking temperatures over the next five years. (Supplied: Foreign Correspondent)

Global temperatures are set to break records in the next five years, with a 98 per cent chance one will be the warmest ever recorded, according to a new report from the UN's meteorological agency.

The report, released by the World Meteorological Organization, said the weather phenomenon El Niño is likely to combine with climate change to fuel the global temperature increase.