A technical glitch means the BBC Weather app and website are showing users unusually low temperatures for their area.
While most can expect warm temperatures around the seasonal average and scattered showers heading into next week, visitors to BBC platforms are being told to brace for an autumnal 7C or 8C.
A problem at a third party supplier is to blame for the issue and engineers are working to fix it.
BBC Weather apologised for the issue.
The somewhat surprising “forecast” comes amid a spell of warm weather that has seen daytime temperatures consistently above 20C in recent weeks.
While BBC Weather experts already expected conditions to cool off across the country, it will be far more pleasant than the BBC app might lead you to believe this morning.
BBC Weather presenter and meteorologist Simon King said: “While the data for Friday and Saturday has now been fixed and up to date, beyond that the technical glitch is still showing temperatures of 7C or 8C.
“Don’t worry, we’re not going back to winter. Temperatures in fact will be around the average for the time of year – around 16C to 23C – north to south across the UK.
But he did predict some of the affected days next week will see heavy rain and strengthening winds at times.
Efforts are under way to resolve the BBC Weather issue, which originates with a third party supplier contracted to provide data.
The issue has affected television broadcasts, with screens during the forecast on BBC News At Ten displaying the predicted temperature in Edinburgh, Belfast, Cardiff and London as 8C every day from Monday to Thursday.
In a statement, BBC Weather said: “Our apologies for the incorrect temperatures appearing on the website and app. We are working with our data suppliers to fix this fault.”
The issue drew reaction from dozens of social media users.
Eugene Gaughan wrote: “The BBC weather app has gone back to February.”
“I hope the BBC weather app is just broken and this isn’t tomorrow’s weather!” said Bill Badger.
Charlotte Foster said simply: “The BBC weather app is drunk.”
