Walking in the gardens: Deauville's gardens, such as the Jardin des Planches or the Jardin de l'Hôtel de Ville, are pleasant places to walk with your dog. Just make sure you keep your dog on a lead and pick up after it.
Walking in the area: The area around Deauville offers some lovely hiking trails where you can take your dog. For example, the Saint-Gatien-des-Bois forest is a great place for a nature walk.
Café or restaurant : Some cafés and restaurants in Deauville accept dogs on their terraces. Ask local establishments about their pet policies.