Primary Industries and Water Minister Jeremy Rockliff on Sunday said the state had not had a "prolonged period of dry weather" and would not declare a drought in Tasmania.

Last week, the Bureau of Meteorology revealed that the North-West, Midlands, East and South-West had had the lowest rainfall on record.

While the responsibility of declaring a drought is up to the federal and state governments, by BOM definition, a drought is a sustained record water deficiency for more than three months.

Many farmers as well as the state's Opposition Leader Bryan Green, have been calling on the state government to declare a drought.

Mr Green said the government's reluctance to declare a drought was insulting to Tasmania's farmers.

"Farmers know how dry it is, how much they're paying for stock and the impact it's having on their lives and businesses," Mr Green said.

"We've had three of the driest months on record and for farmers to be told it's not a drought is patronising."

Mr Green said the state government should stop delaying the inevitable and declare a drought so that much-needed assistance could be provided to Tasmania's farmers.

TFGA president and farmer Wayne Johnston said neither he nor his father could a remember a drier season.

"I have had discussions with the government [on Sunday] and spoke to members on Saturday to get a feel about what the conditions are like around the state," Mr Johnston said.

He said he would be hesitant to call a drought now, but would expect a drought to be called if the dry weather continued.

Mr Johnston said the state government was always willing to work with industry stakeholders, including the Tasmanian Farmers and Graziers Association, to provide assistance to farmers.