I’d skip cast iron and solid teak if you want to move the bench around your patio regularly—those look great but they’re a chore to shift. Instead, look at three materials: aluminum, resin/polypropylene, and fold-flat wood. Under 30 lb is the sweet spot for one person.
For a modern, easy-carry option, an aluminum-frame sling bench is my favorite. Models like the Noble House aluminum sling bench often come in around 15–25 lb. The frame won’t rust, and the sling seat dries quickly after rain. Grab it by the back rail and move it into the sun or shade without help.
If you want the classic park-bench look with zero maintenance, try a resin bench. The Keter Eden bench and Adams Manufacturing folding benches are good lightweight outdoor bench examples—many are under 20 lb. They hose off clean, and the folding ones can lean against a wall when you need extra patio space.
For wood looks without the weight, check out eucalyptus or acacia folding benches like the Household Essentials fold-flat eucalyptus bench. A 20–25 lb folding wood bench gives you warm wood grain but can be stowed easily. Just plan on a quick seasonal oil or sealer if you leave it in the weather.
One more tip: go shorter. A 36–48 inch two-seater is much easier to maneuver around corners than a 60-inch bench. Look for side handles or a cut-out back—that makes a bigger difference than the listed weight alone.