The 2W2E website will provide multiple types of future weather datasets, which can be used directly by SWAT (https://www.2w2e.com/home/CIMP). We have used it to predict the potential phosphorus emissions of the paddy field basin in the next 80 years, as followingArticle Estimation of Phosphorus Transport Influenced by Climate Cha...
Free, open source, graphical user interface for SWAT calibration, parameter sensitivity/uncertainty analysis. ... SWAT+ Toolbox is a user-friendly tool for SWAT+ model adaptations.