The four-time premiership coach will be rewarded for his performance this season guiding the Hawks to a top-four finish.
“I believe in the coming days Hawthorn will announce a long-term re-commitment to their coach Alastair Clarkson,” Lyon told SEN Breakfast.
“That’s going to 100 percent happen.”
Lyon also believes Clarkson’s renewal could have an influence on Dylan Shiel’s future.
The GWS midfielder is considering a move to Victoria and has been linked to Hawthorn, along with Carlton and St Kilda.
“That may have some bearing on the Dylan Shiel decision,” Lyon said.
“If Dylan Shiel is weighing up money versus success versus being coached by one of the greatest coaches that has ever walked the face of the earth, the fact he would know Alastair Clarkson is going to be on a longer term deal, then he would have to take that into heavy consideration if that’s part of his reasoning.”