Coonawarra Climate

Although a cool region, Coonawarra seldom becomes as cold as illustrated. When it does, sprinklers keep the vines wet and, even if ice forms, prevent frost damage.

The advantage of this relatively cool climate is that a long ripening season ensues, which in turn produces excellent fruit flavours and a unique tannin structure in the wine. When hot days do occur in summer, they are usually tempered by cool nights; a consequence of a maritime influence, the region being only 100km from the coast.

Autumn rains rarely fall until late April, allowing adequate time for a fine and fungus-free harvest. Rainfall averages 600mm annually, with nearly half falling in the winter, reflecting a temperate Mediterranean climate. Modest summer irrigation from the aquifer, averaging 50mm, ensures good vine health and fruit quality.

Coonawarra is at located 37⁰ 5’ south and 140⁰ 50’ east, with an elevation of 60m. Its daily mean temperature during the growing season is 16.5⁰C, with a heat summation of 1337⁰C. Bordeaux is similar, with 16.9⁰C and 1392⁰C respectively. (ref: J Gladstones 1992)

For further information, please see Coonawarra Aquifer.