Wind can damage patio furniture by pitting it with dust and other debris. Even when the furniture is undamaged, keeping it from blowing away in the first place saves a lot of time and frustration.
Set up a windbreak
Keep the wind from reaching your patio furniture by deflecting it with a windbreak. A hedge of tall greenery is the best choice for a windbreak because it cannot blow away.
Cover the patio furniture
Place covers on your patio furniture to keep it from blowing away and protect it from any wind damage. The covers serve to weigh down the patio furniture.
Use earthquake gel
Apply earthquake gel to the bottom of your patio furniture's legs to hold it in place on the ground. This solution comes with the disadvantage of not being able to move your furniture around easily.