Anote Tong told Pacific Beat the concrete offer of sanctuary still needed to be worked out, but he says it is a very encouraging step.
He says some villages on the nation's 32 low-lying coral islands have already had to be relocated because of climate change and he foresees a time when the whole population will need to move.
"It's a last resort," Mr Tong said, "It's not something that we would wish to see happen. But given the scenarios being put forward we are getting ourselves prepared for that possibility.
He says Kiribati and its people have been working hard to make sure residents can emigrate to whatever country they choose if their homes are threatened.
"We've been [applying] a strategy of up-skilling our people so that they can migrate at any time on merit as skilled people to integrate into their new communities... with dignity." he said.
Mr Tong says one entire village has already been uprooted by encroaching sea water and in several other townships houses have had to be moved as erosion
"There are a number of villages which are facing those problems now with the intrusion of the sea water into their fresh water ponds and affecting food crops"
Mr Tong has been awarded the 2012 Hillary Laureate for leadership for raising global awareness about the effects of climate change in the Pacific.
He says he is disappointed that there is still some denial in the international community over the projected impacts of climate change on people.