Featuring luggage storage, the 3-star Opal'Inn Boulogne-sur-Mer lies approximately a 5-minute walk from Nausicaa National Sea Center Aquarium. Casino Partouche Boulogne is located merely 1.7 km from this Boulogne-sur-Mer hotel, boasting a lounge bar and sea views.

The centre of Boulogne-sur-Mer can be reached within a 20-minute walk, and natural attractions like the theme park "Ephemere Garden" are about 25 minutes' walk away. Casa San Martin is a mere 1.8 km away, while The Beuriere House Museum is in close proximity to the smoke-free Opal'Inn. Nature lovers will appreciate the proximity to Plage de Boulogne-sur-Mer, which is 600 metres away. This hotel is within 30 minutes' walk of La Crypte de Notre Dame Archaeological Museum. Opal'Inn is 250 metres from Descente a la Mer bus stop and merely 1.7 km from Boulogne-sur-Mer train station in Boulogne-sur-Mer.

There are 46 rooms at the property, each of them has air conditioning, as well as entertainment amenities such as a flat-screen TV with satellite channels and Wi-Fi. The rooms include a private bathroom. Guests can use a roll-in shower, along with bathrobes.

Open daily from 6:30 to 11:00, this Boulogne-sur-Mer hotel serves a buffet breakfast. The restaurant Brasserie L'Endroit is a stone's throw from the Opal'Inn.