This study evaluates the effects of climate change on rainwater tanks savings in Sydney, Australia. It includes sections on introduction, literature review, methodology, data analysis, results, discussion, and conclusions. The study uses qualitative data collection and a daily water balance model to assess the impact of climate change on rainwater tanks savings. The data is estimated from 2020-2039 & 2060-2079 using various climate models and stations in Sydney. The conclusion highlights the inconsistency in the data and identifies the stations with the lowest and highest water savings.