The Met Office has said it was wrong to tell people to expect a barbecue summer and a warm winter and it looking at including more information on forecasts.
Julia Slingo, Chief Scientist at the Met Office, said the national weather service had let the public get the wrong message when it predicted a "barbecue" summer earlier this year and then revised the forecast when July and August turned out to be wet.
She also said the Met Office got "a lot of the communication wrong" this winter by predicting a mild winter before heavy snowfall brought much of the country to a standstill.
"It certainly damaged us as an organisation," she said. "The communication of those forecasts was not done – in retrospect – very well. The science is very good and we do some very good seasonal forecasts worldwide. Trying to do a seasonal forecast for the UK is really hard."
The Met Office has faced criticism for its recent predictions and its 90-year contract at the BBC is even under threat.
Prof Slingo admitted there has been a particular problem in communicating the "probabilistic" nature of seasonal forecasts.
She said the weather service should look at predicting the likelihood of seasonal weather in percentages, as is done in many states of America. For example predicting the likelihood of rain as between 30 to 40 per cent.
She also said the public needs to better understand the science of predicting longer term weather patterns following the recent scandals around climate change.
"People will say if you cannot forecast beyond a week or so how can you forecast climate change?" she said.
"I think the public are very confused and I do not think we as scientists have helped them as much as we should to really understand the fundamental evidence of climate change. To understand why global warming is different from natural variations. Why we can have a very cold winter in the UK when the world as a whole is warming. We have not explained that very well. In the Met Office we are trying to explain the scientific basis of global warming much better at all levels of society."