Great question—nothing ruins a sunny afternoon faster than sitting down on a bench that feels like a frying pan. The good news is that there are several materials and designs specifically suited for staying cool even under direct summer sun. Here’s what I’d recommend.
First, think about wood, but not just any wood. Dark hardwoods like ipe or mahogany absorb a lot of heat. Instead, go for lighter-colored woods such as cedar, cypress, or white oak. These have lower thermal mass and reflect more sunlight. A slatted design helps too, because air can circulate between the boards instead of trapping heat. If you want a classic look, a natural cedar bench with an oil finish stays noticeably cooler than a painted metal one.
Second, recycled plastic lumber—the kind made by brands like POLYWOOD or Loll Designs—is fantastic. It doesn’t conduct heat the way metal does, and it comes in light colors that reflect sunlight. Even better, it won’t splinter or fade, and you can leave it outside year-round. I’ve sat on a light gray POLYWOOD bench in 95°F weather, and it was warm but totally comfortable. Avoid dark brown or black plastic; those will still heat up.
Third, if you like the look of metal, choose aluminum with a powder-coated finish in a light color, or better yet, metal mesh or perforated steel. The mesh allows airflow, so even though the metal itself gets hot in direct sun, it cools down almost instantly when you sit on it because your body heat and the air circulate. Look for benches with a mesh seat and back—they’re common in parks and transit stops for exactly this reason. Avoid solid steel or wrought iron benches painted black; those are the worst offenders.
One more tip: location matters as much as material. Even a wooden bench will get hot if it sits in full afternoon sun with no shade. If you can, place the bench under a tree, awning, or pergola. But if shade isn’t an option, go for a light-colored cedar or recycled plastic bench with slats, or an aluminum mesh bench. You’ll be able to sit comfortably all summer long.