The frequency with which you need to treat or seal your wooden outdoor furniture depends on several key factors, primarily the type of wood, the climate you live in, and the type of finish initially applied.
For most common woods like pine or cedar, a general rule is to apply a new protective sealant once every one to two years. However, this is not a fixed rule. Durable hardwoods like teak or ipe may only require sealing every two to three years, or even less frequently, as they have natural oils that resist moisture.
Your local climate is a major driver. Furniture exposed to intense, direct sunlight, heavy rain, or significant snow will need more frequent attention—potentially annually. In contrast, furniture in a more sheltered location or a milder climate can often go longer between treatments.
The best way to determine the need for resealing is to perform a simple water test. Sprinkle a few drops of water on the wood's surface. If the water beads up, the existing seal is still effective. If the water soaks into the wood and darkens it, it's time for a new coat of sealant or oil. Regular cleaning and immediate attention to wear will ensure your furniture remains beautiful and protected for many seasons.