FRANKFURT--Economic growth in Germany and the eurozone next year could outpace current forecasts, which don't fully reflect the decline in oil prices, Jens Weidmann, president of the Deutsche Bundesbank and a member of the European Central Bank's governing council, says in an interview published Sunday.

"As things currently stand and if the oil price remains at current low levels, inflation will be even lower than forecast but growth will be higher," Mr. Weidmann tells Sunday newspaper Frankfurter Allgemeine Sonntagszeitung.

"Our current economic forecasts don't yet fully reflect the decline in the oil price, which has fallen some 25% since the cut-off date," Mr. Weidmann says. The substantial slump in the oil price will cause lower prices for a number of goods because of lower production costs, and simultaneously stimulate the economy, Mr. Weidmann says.

Earlier this month, the German central bank halved next year's German growth forecast to 1% from 2%.

Due to the low oil price, the German government also expects growth in the eurozone's largest economy to get a boost of between 0.2 and 0.3 percentage point next year, weekly magazine Der Spiegel reports Sunday, citing an internal note from the German Economics Ministry. Because of the oil price decline, the German government will pay some 12 billion euros ($14.6 billion), or almost 25%, less to oil-producing countries next year than in 2014, and the ministry expects the oil price to hover at low levels for several years, according to the report. A ministry spokeswoman declined to comment on the report.

Mr. Weidmann also reiterated his opposition to plans by the ECB to buy government bonds to stimulate the eurozone economy, saying such measures aren't needed considering the area's economic prospects, as long as falling prices don't lead to second-round effects such as on wages.

Write to Frankfurt bureau at djnews.frankfurt@dowjones.com