From Paris Saint-Lazare, take a TER/Nomad train to Valognes. Then continue to Barneville-Carteret by taxi (≈ 30 minutes) or by bus.
Take the A13, then the RN13 via Caen and Valognes towards Barneville-Carteret. When you arrive on Boulevard Maritime, you can’t miss it: Le Bain des Dames is the only house on the beach side, with direct private access to the sand. Get directions