Dairy farmers in Waikato, Taranaki and the West Coast are drying off their herds early because of the weather.
Waikato Federated Farmers regional president Stew Wadey says the dry conditions have affected milk production this season, and farmers have been buying supplementary feed.
He says many farmers are drying off their herds two to three weeks earlier than usual.
Rain over the last 10 days is boosting grass growth, but Mr Wadey says more is needed to take them into winter.
In Taranaki, Federated Farmers says the season had been going well until the last month.
However, regional chair Caroline Glibert says says some farmers are worried any shares they buy this year to cover extra production may have to be redeemed at a loss next season when the payout will be less.
On the West Coast, Federated Farmers says dairy farmers are ending the season a little earlier because of too much rain.