 The region produces just three percent of total Australian grape production, but commands over 20 percent of the Australian premium wine market.Stretching some from north to south and about wide in parts, the region is bounded to the east by the Leeuwin-Naturaliste Ridge, between Cape Naturaliste and Cape Leeuwin, and to the west by the Indian Ocean.A Mediterranean-style climate, lacking extreme summer and winter temperatures, provides ideal growing conditions.