The overall yield is estimated at up to 10.5 million hl - a little higher than the 2007 figure.
The 2008 vintage was influenced by "favourable" summer conditions, although the rain and low temperatures of the autumn made the harvest challenging in some areas.
Monika Reule, managing director of the German Wine Institute in Mainz, said: "This year, German wine enthusiasts can look forward to lively, light white wines with a fresh, fruity acidity - the wine profile that is currently in vogue. The reds are also promising and rich in colour."
According to the trade body, the crop yielded good to very good QbA and Prädikat wines in all regions, with a slightly higher proportion of QbA than last year and some regions harvesting top quality grapes .
Moselland's chief winemaker, Mathias Krämer, said: "Overall quality was slightly above average, including some promising Spätlese wines. The 2008 vintage is very similar to the 2004 vintage, which delivered very lively, fruit-driven and durable wines."