"The seasonal forecast from October to December tends to point to a mean temperature for the whole of Switzerland above the average of the last 30 years," Stephan Bader of weather forecaster MeteoSchweiz told the newspaper.
A mild start to the winter would help to ensure that gas supplies and water reservoirs do not empty too quickly.
The Swiss government last month launched a voluntary campaign to urge consumers and businesses to conserve energy as shortages of gas and power loom this winter that could lead to rationing in a worst-case scenario.
Long-term models from the European Centre for Medium-Range Weather Forecasts (ECMWF) were also encouraging for February, when the danger of a power shortage is most acute, the NZZ said.
"The probability of above-average values is increased according to our weather maps," Carlo Buontempo, from the ECMWF's Climate Change Service, told the newspaper.