The town is situated in the west of the département, between Notre-Dame-de-Monts and Saint-Hilaire-de-Riez. It is split in two by a long plantation of pine trees, stretching from north to south along the coast. The centre-ville lies to the east of the cordon, while the seafront forms a lively center to the west.
Saint-Jean-de-Monts is renowned for its sandy beach, more than eight kilometres long. Due to its often low tides, it offers a great area for walkers, fishermen, and beach games.
The town is noteworthy for the recent restoration of its seafront, a vast town planning operation taking over five years to complete. The successful result now means a network of footpaths and cycle tracks are enhanced by an array of plants, flowers and shrubs.
The predominantly flat terrain has allowed for the development of a vast 500 km² network of cyclepaths, known as the Sentiers Cyclables de la Vendée. These paths stretch from the island of Noirmoutier in the north, south past Saint-Gilles-Croix-de-Vie.
Since 1867, bathers have been coming to the beach at Saint-Jean-de-Monts in large numbers, and since 1892 it has been the inspiration for many artists. The original church still lies in the center of the old village.
The pier on the beach (build in 1964) acts as a pontoon over the sea, and is a popular location for fishermen and walkers, although, unfortunately, during the storm of February 2010, the pier was significantly damaged. It has been completely deconstructed during the winter 2011. The new version of the pier is in progress, a part of it will be available for the summer 2012 and the entire pier will be finished in 2013.