It's a valid concern that many people share when considering wood outdoor furniture. The short answer is that while splinters can occur, they are not an inevitable issue and are often a sign of a specific condition or lack of maintenance.
Splinters typically arise from wood that is either poorly finished, has been damaged by prolonged exposure to the elements, or is made from a low-quality, rough-cut lumber. High-quality outdoor furniture made from woods like teak, cedar, or eucalyptus, which are naturally resistant to decay and often meticulously sanded and sealed, presents a much lower risk. The finish is your primary defense. A durable sealant, varnish, or oil finish creates a protective barrier that shields the wood fibers from moisture and physical wear, preventing them from lifting and becoming splinters.
Furthermore, regular upkeep is crucial. Even the best-treated wood will eventually require re-sealing or light sanding to maintain its smooth, splinter-free surface. If you are purchasing new furniture, look for descriptions like "kiln-dried," "smoothly sanded," and "UV-protected sealant." For existing furniture that has become rough, a light sanding with fine-grit sandpaper can easily restore its smoothness. So, while splinters can be a common issue with neglected or low-quality wooden furniture, they are a manageable and largely preventable problem with proper selection and simple, routine care.