If you want an outdoor bench that won’t feel like a hot plate in July, start with the material. I’d skip dark steel, wrought iron, and cheap dark resin. Bare aluminum is a small step better because it cools quickly, but it can still get uncomfortable in full sun.
The best materials I’d look for are these:
Teak is my first pick if the budget allows. It has natural oils and doesn’t transfer heat the way metal does. A natural or lightly oiled teak bench with open slats stays comfortable even when the air is hot. It weathers beautifully and won’t scorch your legs.
Cedar or cypress is another great option. Both are lightweight and naturally heat-resistant. Choose a natural or lightly stained finish rather than dark paint. A slatted cedar bench lets heat escape instead of building up on the seat.
HDPE lumber is my favorite for full-sun spots because it is low-maintenance. In lighter colors like white, sand, or light gray, it stays much cooler than metal and dark wood stains. It won’t rot, splinter, or need sealing.
Composite wood is also worth considering. A light capstock composite bench resists heat and fading well. Avoid very dark brown or black composite if it will sit in direct afternoon sun.
Concrete or stone benches don’t get as instantly scorching as metal, but after hours of sun they hold heat. If you love that look, place the bench in shade or add light-colored cushions.
A few extra rules: choose light colors, look for open-slat seats and backs, and avoid metal armrests that can burn skin. If you already have a metal bench, add thick outdoor cushions in a light color or move it under a pergola, umbrella, or tree.
For the best mix of comfort, low maintenance, and summer coolness, I’d go with a light-colored HDPE bench or a natural teak slatted bench. Both look good, weather well, and won’t make you regret sitting down in August.