Tuffley cited weakening business confidence, weakening consumer confidence in dairying regions, the weak overnight dairy auction and ASB's expectation that recovery in dairy prices will be slower.
But there were some uncertainties around when or if the last cut would be delivered, Tuffley said.
"The New Zealand dollar has already fallen substantially, and will also help prop up the economy and inflation. And, low interest rates are already fuelling the housing market."
Further interest rate cuts would further stoke the housing market and add to the Reserve Bank's macro-prudential concerns about it, he said.
• Brian Gaynor: Rock-star economy needs plan if it's to last
• Auckland property prices surge by 20 per cent
• Reserve Bank caught in signalling dilemma
Deutsche Bank chief economist Darren Gibbs said on Tuesday that over coming months the Reserve Bank was likely to conclude that it was prudent to unwind all of the monetary policy tightening undertaken in 2014, taking the OCR back to 2.5 per cent.
ANZ is calling for two more OCR cuts with a risk of more, while Westpac is picking cuts in both July and September.