Eight months after succeeding Mike Baird as NSW Premier, Gladys Berejiklian is holding her own against the Labor opposition but the leadership switch has failed to deliver the government any real bounce, exclusive polling shows.

A ReachTel poll commissioned by Fairfax Media also reveals support for minor parties increasing at the expense of Labor and the Coalition ahead of two byelections in the rural seats of Cootamundra and Murray this weekend.

The poll of 1647 NSW voters taken on Thursday night shows the Liberal/National Coalition leading Labor by 52 per cent to 48 per cent on a two-party preferred basis using preference flows from the 2015 election.

This is a one percentage point slip for the government from a ReachTel poll taken in December just weeks before Mr Baird quit as premier in January citing the need to "refresh" the government for the 2019 election.