The plugin allows Pre and Post-processing for Mascaret (http://www.opentelemac.org/).

QGIS(3.22) is the required QGIS version for Mascaret Plugin.
Mascaret Plugin can be installed from the plugin manager:

In the All tab search for mascaret, select it and click Install plugin button.

Mascaret Plugin needs a connection to PostgreSQL database with spatial extensions of PostGIS.