Prepare to add 15 lbs. of weight to each canopy leg, or 60 lbs. in all for a 10 foot by 10 foot square shade canopy. Forty lbs. total is the minimum needed to weigh down a canopy and protect it from the wind when set up on a hard surface. Sand is a soft surface, so the extra weight will be useful.
Purchase PVC pipe 3 to 4 inches in diameter. Purchase 4 PVC pipe tubes, each 2 to 3 feet high. Alternatively, you can purchase one long PVC pipe and cut 4 pieces with a hand saw. Purchase 8 caps or covers for the PVC pipe.
Attach caps to one side of PVC pipe.
Mix concrete and water in a plastic bowl. Pour concrete into PVC pipes. Wait to dry.
Weigh the PVC pipes and attach caps to top after concrete has dried. Mark the weight on the PVC pipe with a permanent pen.
Experience may lead you to believe you need more or less weight, so it is good to have the reminder written on the pipe.
Set up canopy on the sand. Attach one pipe to each canopy leg with 2 or 3 small bungee cords on each leg. Put one bungee cord at the top of the pipe, one on the bottom, and the third in the middle.
Protect yourself from sand being kicked up by wind. Use canopy sidewalls that zipper together to create a barrier. Place a rug or flooring on the floor under the canopy. If you have a 10 foot by 10 foot rug for the same size canopy, anchor the rug by placing the four corners under the weighted legs.