If you can drop a bait or lure out there about 20 yards, it's all you need. However, nothing is as productive as live bait, and you can often jig your own sardinetas or catch live mullet as you'll see the locals doing or negotiate with one of them to fish your bait for a fee. Dead bait is often effective as well, and you can get it at the major fish markets and keep it iced down in your cooler. By all means, wear suitable shoes. It's easy to step on a sharp stone, sting ray or a broken beer bottle, and shoes also serve as protection from the sun.
Sunburned feet are something to reckon with.
You will also need sun screen for the rest of your hide unless you're smart enough to wear long cotton pants and shirt, and I highly recommend a squirt can of insect repellent to ward off sand fleas and other hungry critters that come out in the evening. You can usually tell from the way the sea is breaking where the deep cuts that fish like to hang out in are located, so study the water and try to work those holes. Keep moving and experimenting, perhaps moving back to the original location as the tide changes. I've found the period from about an hour before to an hour after high tide to usually be the most productive, but there are many exceptions. Best time of the year is generally from July through late May.