"Price volatility is at extreme levels with a fall of more than 20 per cent in one month, with prices in New Zealand dollars now lower than during the global financial crisis," said chairman Matt O'Regan.
"Demand from China remains soft and is unlikely to firm up before the end of this calendar year.
"The ongoing sanctions against Russia limit purchasing activity from this large global dairy importer, especially from Europe.
"This makes the milk oversupply even more of a problem for New Zealand exporters, as European competitors look more aggressively to the international market to sell."
Fonterra Co-operative Group, the world's largest dairy exporter, is expected to lower its forecast payout to farmers for this season following its board meeting next month. The Auckland-based company currently forecasts a payout of $5.25 per kilogram of milksolids for the 2015/16 season, from $4.40/kgMS last season and a record $8.40/kgMS the previous season.
Dairy NZ estimates $5.70/kgMS is the industry average breakeven point for most farmers.