Podensac is located within the Gravesvineyards, on the left bank of the Garonne river, 30 km (19 mi) southeast from Bordeaux and 15 km (9 mi) northwest from Langon. Podensac station has rail connections to Langon and Bordeaux.
Mascaret (tidal bore): the mascaret is a phenomenon in which the leading edge of the incoming tide forms a wave of water in the Gironde estuary that then travels up the Garonne river.