Short answer: yes—there are plenty of heavy outdoor bench options. If you want something that will resist being tipped over, focus on concrete, granite, solid cast iron, or fully welded steel. These materials typically put a bench in the 250–800+ lb range, while lightweight aluminum or hollow steel benches can be as little as 40–70 lb and tip easily.
My general weight guide is this: 120–200 lb is fine for most residential use; 200–350 lb is much harder for one person to tip and is common for commercial cast iron and steel benches; 400–800+ lb is extremely stable and typical for concrete and granite benches.
Concrete and granite benches are the heaviest and most stable choice. A 6-foot concrete outdoor bench from commercial brands like Wausau Tile, Maglin, or DuMor often weighs 500–900 lb. Granite slab benches can be similar or heavier. These are excellent if you want a truly tip-resistant outdoor bench that can stay outside year-round. The main downside is that they are difficult to move once installed.
Cast iron and ductile iron benches are another strong option. A cast iron bench with heavy cast ends and wood or steel slats is a classic look, and commercial park models from Victor Stanley, Keystone Ridge Designs, or DuMor typically weigh 200–400 lb. That is usually enough to stop casual tipping, especially if the bench has a wide footprint. Be careful: many decorative “iron” benches sold at home centers are actually lightweight aluminum or thin steel, so always check the actual shipping weight before buying.
Welded steel benches are also worth considering. Look for a weighted outdoor bench with a steel frame, a concrete-filled base, or a surface-mount design. Brands like Landscape Forms and Maglin offer steel benches in the 250–500 lb range. If a steel bench is under 200 lb, I would plan to anchor it to a concrete pad.
Recycled plastic benches are low-maintenance, but most models are not heavy enough on their own. They usually weigh 90–180 lb unless they include a steel frame or ballast. If you like this material, choose a model that can be filled with sand or gravel, or choose one with a steel internal frame.
If you want a specific recommendation, for most people a commercial cast iron bench in the 250–400 lb range is the best balance of looks, price, and stability. If you need maximum no-tip performance, go with a concrete or granite bench in the 500 lb+ range.
One last thing: a 400 lb bench is very hard to tip, but a determined group can still move almost anything. In public areas, schools, or windy sites, use both weight and anchoring. Surface-mounting the feet into a concrete slab is the most reliable way to make any heavy outdoor bench stay put.