The short answer is: it depends entirely on the material. Traditional natural wicker, made from rattan, willow, or bamboo, is not durable for year-round outdoor exposure. It can quickly deteriorate from moisture, sun, and temperature swings. However, modern synthetic wicker (also called resin wicker or all-weather wicker) is specifically engineered for outdoor durability.
Made from high-density polyethylene (HDPE) or PVC, synthetic wicker is designed to resist the elements. It won't rot, crack, or fade easily when properly constructed and finished. The true durability hinges on the frame material (powder-coated aluminum or stainless steel is best) and the quality of the synthetic weave. High-quality all-weather wicker, when protected under a covered patio or with furniture covers during extreme weather, can absolutely provide years of service. For genuine year-round use in harsh climates, choose premium synthetic wicker with a robust frame and UV-resistant finish, and perform simple maintenance like occasional cleaning.