Capital Economics said with "GDP growth likely to fall short of the RBNZ's projections and inflation set to remain subdued, we anticipate that rates will remain on hold for even longer than the RBNZ or the financial markets currently expect.
"We suspect that the first rate rise may not occur until 2020."
It made the comments after Stats New Zealand said first-quarter gross domestic product growth was 0.5 per cent, below the RBNZ's forecast for 0.7 per cent.
It also pointed to weak business confidence, "marooned around its lowest level in a decade since the election-related slump in September last year" and subdued inflation.
ANZ Bank New Zealand senior economist Liz Kendall also said that developments since the central bank's last monetary policy statement have been negative on balance and while "there are reasons to believe some degree of pick-up in inflation is around the corner" economic momentum is softening. As a result, "we see inflation increasing only very gradually."
We suspect that the first rate rise may not occur until 2020.
Kendall expects the central bank to "remain cautious until inflation shows more consistent signs of life." She notes the RBNZ has been very clear that it is determined to meeting its inflation target and therefore it will maintain its 'wait-and-see' approach.
Westpac Banking Corp chief economist Dominick Stephens said, however, that rather than signalling rates would be on hold for longer the details of next week's statement "may be a touch more hawkish."
According to Stephens, over the past six weeks there have been three key developments with the potential to alter the outlook. Petrol prices have risen sharply, which is likely to cause inflation to rise 2 per cent - or even beyond - this year. However, he expects the RBNZ to emphasis that petrol prices tend to have a "fleeting effect" and that core inflation remains well below 2 per cent.
He agreed that the economy is slowing rather than accelerating but said "the government's budget was stimulatory" and on its own could allow the central bank to lift its OCR forecast.