The Soil & Water Assessment Tool is a small watershed to river basin-scale model used to simulate the quality and quantity of surface and ground water and predict the environmental impact of land use, land management practices, and climate change. SWAT is widely used in assessing soil erosion prevention and control, non-point source pollution control and regional management in watersheds.


Introducing SWAT+, a completely revised version of the SWAT model. SWAT+ provides a more flexible spatial representation of interactions and processes within a watershed.

Download SWAT+
Updated 31 March 2022

Join us July 2022 in Prague

An International SWAT Conference & Workshops will be held 11-15, July 2022 at the Czech University of Life Sciences Prague, Faculty of Environmental Sciences. Remote and in-person participation options available. Register and learn more.

Upcoming Workshops

There are no upcoming workshops scheduled at this time. Check back soon.

Software & Data Tools


SWAT+ rev. 60.5.4, QSWAT+ 2.2, SWAT+ Editor 2.1

31 Mar 2022

QGIS3 Interface to SWAT / Version 1.5

6 April 2022
SWAT2012 Model

Executables and source code / rev. 682

20 Oct 2021

ArcGIS Interface to SWAT / Version 2012.10.24

19 August 2020

Version 3

9 Jul 2019
Global Weather Data for SWAT

Climate Forecast System Reanalysis (CFSR) data from 1979-2014


Calibration/uncertainty or sensitivity

WGN Parameters Estimation Tool

Using Microsoft Access / Version 0.18.03

17 Apr 2018
WET - Water Ecosystems Tool

Advanced lake and reservoir modeling coupled to SWAT

Job Opportunities

Looking for job opportunities related to SWAT and/or watershed modeling? Check out our listing.

Reviewers Needed

We are looking for help reviewing SWAT peer-reviewed journal papers from the community. Sign up as a volunteer.