I’ve dealt with this on a windy balcony, and the fix is usually a mix of restraint and smarter cushion choices. The short version: don’t rely on gravity alone. Wind gets under the cushion, lifts it, and once the edge catches, it’s gone.
Start with straps or clips. If your outdoor furniture cushions have ties, tie them to the chair frame or arm, not just to each other. If they don’t, add outdoor Velcro strips, cushion clips, or short bungee cords. A couple of well-placed straps across the seat can make a big difference without looking too industrial.
Then add a little hidden weight. Weighted cushion inserts, sandbags sewn into the back seam, or a grippy anti-slip pad under the cushion can stop the small lifts that turn into full takeoff. Avoid leaving loose bricks or heavy objects on top; in a strong gust they become hazards.
Choose wind-friendly cushions when you replace them. Look for breathable, perforated foam or covers with drainage vents so air passes through instead of ballooning underneath. A snug fit helps too—cushions that overhang the frame catch more wind.
Placement matters in urban spaces. Balconies, rooftops, and courtyards often have wind tunnels. Angle chairs toward a wall or railing, group furniture to break the airflow, and lower the backrests if you can. On very exposed balconies, consider lightweight stacking chairs with cushions you can bring in.
Finally, make a quick high-wind routine. If strong gusts are forecast, flip cushions upright, stack them in a storage box, or take them inside. It takes two minutes and saves you from chasing a cushion down the street. The best setup is the one you’ll actually maintain: simple straps, a grippy base, and a willingness to store the cushions when the weather turns.