This dataset comprises oxygen isotope (δ¹⁸O) records derived from two stalagmites, BA14-1 and BA18-4, collected from Bàsura Cave in the Liguria region of northern Italy. The combined records provide a continuous proxy spanning from approximately 6500 years before present to around 1950 AD. The aim of this data collection is to reconstruct high-resolution hydrological and climatic changes in northern Italy, thereby offering valuable insights into past water cycle dynamics and regional climate variability over millennial to centennial timescales.