Tasmania has just had its driest spring on record and the effects of the weather are being felt at Bonorong Wildlife Sanctuary.

Greg Irons, the director of Bonorong, said the lack of growth over the past three months was being felt with a shortage of hay.

The park goes through about a bale of hay a day to feed the wallabies but staff are struggling to find any to buy.

"It's becoming a bit of an ongoing issue," Mr Irons told Leon Compton on ABC Local Radio Tasmania.

"It's the same reason we're seeing a real spike in rescues and animals in suburban areas — the growth has been so poor, there's not much about unfortunately."

October was the driest in Tasmania since record keeping began more than 140 years ago, with little rain recorded in September or November also.

Bureau of Meteorology climatologist Ian Barnes Keoghan told ABC Rural the models for this summer showed some possible good news for dry southern Tasmania.

"The models are now indicating the El Nino will start to decay shortly and that could change things," Mr Barnes Keoghan said.

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"The outlook for December to February is pretty much neutral, with a 50/50 chance of above or below-average rainfall.

"But we see the possibility of a couple of bright spikes where some wet weather could come in."

Mr Irons said Bonorong would need millions of acres of grass to feed all of the animals in the park without supplementing with hay, and the staff are handpicking grass for the animals wherever they can find it.

"Hay is the good stuff," he said.

"We do buy it and we're happy to get a truck-worth at a time, it's just a case of actually finding it available, [that] is the issue.

"Sometimes it's available right up the top of the state but not down here."

The sanctuary has put a callout on social media to try to find hay.

"If it's affecting us, it's going to be affecting an array of different people," Mr Irons said.

He said the sanctuary had only three or four bales left.

They can feed the wallabies extra pellets which are more expensive than hay and not as filling.

If you know of some hay stored away that could help Bonorong get through the dry spell, you can contact the sanctuary via its website.