International records indicate El Nino is certain (100 per cent chance) to continue over September to November and extremely likely (above 90 per cent chance) to persist into summer 2015-16.
The current state of the ocean atmosphere in the Pacific and the international consensus forecast suggest that this event could rank among the fourth strongest El Nino events recorded (along with 1972-73, 1982-83 and 1997-98).
Mr Wishnowsky believed the likely fire risk this summer would be as high as the 1997-98 summer.
"Based on history with El Nino weather, we need to be prepared as a district for what may well come with that drier weather," he said.
"I am sure the farming community is well aware of the situation."
Fire restrictions are likely to be earlier than usual this year due to the expected drier conditions, with a potential total fire ban over Christmas.
WRFD are already taking steps to ensure that all our firefighting and fire reduction processes are prepared well in advance of summer and encourage forestry companies and rural communities to make preparations now.
Mr Wishnowsky said those who lit fires were responsible for them - as well as the costs of suppression if it got out of control.
For advice about lighting fires, fire permits or fire seasons, contact the WRFD staff - contact details can be found on their website, www.wrfd.org.nz.