Great question! Most street benches do have a weight limit, but it's rarely posted. Typically, a standard public bench is designed to support around 500 to 600 pounds (about 225 to 270 kilograms). That's roughly the weight of three average adults sitting side by side. But here's the thing: the actual limit depends on the material, design, and condition of the bench.
A sturdy metal or concrete bench can often hold more weight, while a wooden bench that's been weathered or cracked might be weaker. Many benches are built with only two or three seats in mind, and the supports are spaced accordingly. If you try to squeeze four or five people onto a bench designed for two, you risk overloading it—especially if people are sitting on the armrests or the back, which aren't designed to bear full weight.
For your safety and the bench's longevity, it's best to follow common sense: if the bench looks full, don't add more weight. If you're ever in doubt, check for visible damage or rust, and avoid overcrowding. Public benches are made for brief rests, not group gatherings—so if you're with a crowd, consider using multiple benches or finding a sturdier spot like a low wall or picnic table.