 The commune is traversed in its entire length from south-west to north-east by the branches of a small stream, the "Virson".This continues its course towards the north-east of the plain of Aunis and swollen by waters of several other streams, becomes a small watercourse in the eponymous village of "Virson" and joined on its left side by the Curé, a small coastal river that flows into the Bay of Aiguillon south of the estuary of the Sèvre.Inside the commune of "Aigrefeuille d'Aunis", the many branches of the "Virson" are the origin of a small river, one of whose arms forms the communal boundary with the commune of Forges to the east, while another branch takes its source from a lake area that feeds "Lake Frace".