BERLIN, July 27 (Xinhua) -- A key survey showed on Tuesday that German consumer confidence boomed in July and August because of the well performance of German team in the World Cup, the hot summer weather and the upbeat of economic recovery.

The Nuremberg-based GfK group said its overall indicator for consumer climate in August rose to 3.9 points from a revised 3.6 points in July.

"The successful performance of Schweinsteiger and Co. in South Africa and the sunny weather with high summer temperatures put the people of Germany into a good mood," said the GfK.

"This is supplemented by the surprisingly positive employment situation. These factors are overshadowing the clear threat posed by negative factors such as the austerity package and increase in health insurance contributions."

The GfK also said the indicator for economic expectations also see a significant gain from 31.3 points in July to 36.8 points in August, the highest figure since October 2007.

"Consumers expect the recovery of the German economy not only to continue further but even to gain additional momentum," the GfK said.

The survey is based on around 2,000 consumer interviews conducted by the GfK each month on behalf of the EU Commission.