Yes, but only if you treat wind as a real structural load rather than a comfort issue. On a rooftop terrace, a street bench can become a heavy projectile in a storm if it is not anchored or ballasted properly. The safest approach combines weight, mechanical fastening, and roof protection.
Start by checking the exposure. If your terrace is high up or located in a high-wind zone, wind uplift and lateral forces are stronger. A solid-sided bench acts like a small sail, and even a heavy bench can slide, tilt, or lift. For most residential rooftops, a bench should either be bolted to an approved structural point or fixed to a ballast frame that is heavy enough for the local design wind speed.
If you are allowed to penetrate the roof deck, meaning the building owner, engineer, and waterproofing contractor all approve, use stainless steel brackets and bolts anchored into the actual roof structure. Do not bolt only into surface pavers or deck boards. All penetrations must be sealed with compatible flashing or sealant to prevent leaks. This is the most secure option.
If you cannot penetrate the membrane, use a ballast system. Concrete pavers, steel plates, or a purpose-built ballast tray can be attached to the bench base. The required weight depends on the bench geometry, height, wind exposure, and local code. A structural engineer can calculate this for you. As a practical rule, avoid lightweight aluminum or plastic benches on exposed terraces unless you add substantial ballast.
Also think about placement and orientation. Keep the bench away from parapet edges if possible, and orient the narrow side toward the prevailing wind. Use rubber pads or a protective mat under the contact points to avoid damaging the roof membrane. Check the bench after major storms, and inspect any bolts, brackets, or sealant seasonally.
A safer alternative is to choose a wind-rated rooftop bench or a bench with a low, slatted profile. These reduce wind resistance and are easier to secure. In short, yes, a street bench can be safely anchored on a rooftop terrace with wind concerns, but only with the right engineering, the right hardware, and permission from the building.