You’ll need a miter saw, a circular saw, a drill, and a pocket hole jig. You can rip boards with a circular saw, but a table saw will give you better results.
We used knot-free cedar for the top. You can use 5/4 cedar or pressure-treated deck boards for the top (if you select good pieces) to save some money. Other good choices include teak, redwood, cypress and white oak. For the base, we used plywood and No. 2 cedar. Our cedar boards were 7/8 in. thick, but 3/4-in.-thick boards would also work. Patio umbrellas are available at home centers.
A note on wood: Home centers often sell boards with a high moisture content, and they can shrink noticeably as they dry out. For a furniture project like this, it’s a good idea to store your wood flat in a dry location for a few weeks before you use it.