I completely understand your worry about splinters—nobody wants to sit down to enjoy a sunny day and end up with a painful surprise. The good news is that most modern wooden park benches, especially those found in well-maintained public parks and city spaces, *are* designed with safety and comfort in mind.
Typically, these benches are made from treated lumber (like pressure-treated pine, cedar, or tropical hardwoods such as ipe) that is sealed or stained with a weather-resistant finish. The sealant not only protects the wood from rain, sun, and rot but also helps smooth out the surface, reducing the risk of splinters. More importantly, before installation, the benches are often sanded down to a fine finish—sometimes even machine-sanded—to ensure the wood is as smooth as possible.
That said, the condition can vary depending on the age and maintenance of the bench. A brand-new or recently refurbished bench should feel silky to the touch. An older bench that has weathered for years without re-sealing may develop cracks and rough edges, which can harbor splinters. In high-traffic areas, park staff usually check and re-sand benches annually or after harsh weather.
If you're still uneasy, here’s a practical tip: give the bench a quick, visual check before sitting. Run your hand lightly over the seat (if it's dry and clean) to feel for any rough spots. Or, if you're in a spot where maintenance is unknown, you can always carry a small blanket or seat cushion—which is both comfortable and splinter-proof.
In short: yes, reputable park benches are sealed and sanded smooth, but age and neglect can change that. Always trust your fingers and a quick glance, and you’ll be sitting pretty and worry-free.