Rabobank said the Australian wine harvest was well under way, and early expectations were for a slightly smaller crop.
Yields in Australia's major inland river regions were tracking at around last year's levels while yields in the more temperate regions across southeast Australia were expected to be a fraction lighter than last year.
Australia is New Zealand's biggest customer, accounting for about 30 per cent of wine exports.
On the international front, Rabobank said the after-effects of the global financial crisis had given the world's winemakers little to celebrate.
"After a long period of buoyancy, UK wine consumption took a severe hit when the storm clouds rolled in back in 2008 and has struggled to regain traction ever since," the bank said.
"But while the absence of growth in many categories has led many global suppliers to reconsider their commitment to the market, for a lucky few the economic climate has created some valuable opportunities to be better engaged with increasingly value-conscious consumers," it said.
Rabobank said there was a strong correlation between real wage growth and still wine consumption in the UK market.
As real wage growth plummeted in late 2008, growth in still wine clearance followed suit and had remained mostly negative ever since.
"Fortunately, signs suggest that the economic environment is ever so gradually improving in the United Kingdom," it said.
Rabobank said it was clear that harvests in the Northern Hemisphere rebounded somewhat last year.
This, coupled with the strong Southern Hemisphere harvest earlier in the year, had allayed concerns over the potential tightening of global wine supplies, it said.