Taoiseach Leo Varadkar will travel to Belfast on Wednesday for a series of meetings with party leaders.
His visit comes amid continued efforts to restore the power-sharing institutions, which have been dormant for the past 18 months.
There had been hopes that Stormont would return ahead of next month's US-backed investment summit, however, the possibility of an imminent lifting of the DUP's boycott appears remote.
Mr Varadkar will also meet a number of civic and business groups during his visit.
Ahead of Wednesday's meetings, the Fine Gael leader stressed the need for the two governments to work in tandem to overcome the current impasse.
He said Dublin and London needed to “work hand-in-glove and apply both pressure and support . . . in a co-ordinated way”, saying a closer partnership was “crucial” to restoring the executive.
“But there has been a reluctance, I suppose, in Downing Street, to go down that route,” Mr Varadkar told the Financial Times.
Irish government sources have been keen to downplay any rift with London.
A brief British government response to the taoiseach's remarks said there was a "long agreed to co-operation in line with the Belfast (Good Friday) Agreement, including through the British-Irish Intergovernmental Conference".
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"The UK government firmly believes that the three stranded approach set out in the Agreement offers the best route to securing the timely restoration of the NI institutions, and our commitment to it remains unchanged," the statement said.
Mr Varadkar appeared pessimistic about the prospects of breaking the deadlock any time soon.
"It is more hope than expectation at this stage, to be frank," he said.
“If we don’t seize this window of opportunity in the next couple of months, talk will turn both in Belfast and in London to the next Westminster elections and it might be after that before we can get things going again."
Ahead of his meeting with the taoiseach, SDLP leader Colum Eastwood said any reluctance on the part of the British government to work with Dublin would be depart "totally unacceptable".
"When it comes to making decisions about the future of the north, the Irish government will always have an important role to play, and we have been clear that unless the institutions are restored the only acceptable way forward will be some form of joint authority," he told The Irish News.
“We have seen over the past 25 years that the north functions most effectively when both governments enjoy a close relationship."
The Foyle MP said the British government needed to "live up to its obligations and engage fully with its counterparts in Dublin".
