Outdoor sofas can indeed be used in a four-season veranda, provided they are made from durable, weather-resistant materials. High-quality options like teak, aluminum, or synthetic wicker, paired with UV-resistant cushions, ensure longevity. For colder months, consider adding waterproof covers or storing cushions indoors. Proper maintenance, such as regular cleaning and occasional sealing, further enhances durability. With the right choices, your veranda can remain a comfortable retreat year-round.