New Zealand wines have scooped 15 gold medals in the prestigious International Wine Challenge.

The awards are run by the Wine International magazine and involve more than 9000 wines from around the world.

Spokesperson for New Zealand Winegrowers Chris Yorke said local wines won twice as many awards this year than last with eight of the golds going to red wines.

Yorke said two New Zealand wines also received trophies, the Sileni Estates Cellar Selection for the best sauvignon blanc and the St Clair Doctors Creek for best pinot noir.

New Zealand was the only still wine producing country to increase its gold medal count at this years event, Yorke said.