ASB Bank said it expects Fonterra to cut its farmgate milk price to around $6.50 a kg of milksolids tomorrow, from the current forecast of $6.75/kg.
Fonterra's current forecast was last updated in September.
"At this juncture, we expect a 2017/18 milk price of $6.50/kg, while the market consensus is around $6.30/kg," ASB rural economist Nathan Penny said.
Meanwhile, dairy auction prices consolidated at this morning's GlobalDairyTrade auction.
Dairy prices have weakened since September.
"Both overall and whole milk powder prices have dipped by a little over 9 per cent since then," Penny said.