If your outdoor shower has a simply wood enclosure or offers no privacy at all, consider making your own outdoor shower curtain. You don't have to be a great seamstress to do the project. In fact, you may be able to accomplish it with little or no sewing at all.
Step 1 - Measure
First, measure the distance around the shower where the curtain rod is, and add half of the measurement to the total. This is the width your fabric needs to be.
Next, determine how long you want the curtain. Since it is outdoors, you will most likely want it to fall no longer than about mid-calf length on an average height adult. Be sure to take into account the length the rings hang from the rod, and include them in your measurement.
Step 2 - Purchase Fabric
Take your measurements to your local fabric store to purchase your fabric. Stick with all cotton or mostly cotton blends for durability and drying time. If your shower is in the sun most of the day, you may want to stick with light, solid color fabric so it won't fade and look old quickly.
A clerk can help you determine how much fabric you will need, including hems. Most likely, your shower curtain will have to be in two pieces sewn together unless you are lucky enough to find fabric that is very wide. You may have better luck with this type of fabric if you visit an upholstery fabric store. If you are not a sewer, you may also find someone at this store who will do the sewing for you.
Step 3 - Sew the Sides and Hems
Sew the side hems to prevent fraying, then do the bottom hems.
If you are not a sewer, you can use fabric glues that will hold very tightly; all you have to do is turn in the hems, iron them so they will be flat and easier to work with, and apply the glue. You will most likely have to clamp the edges with clothespins or clips until it dries. If you are using a bed sheet, you may be able to skip the gluing and sewing all together.
Step 4 - Hang Curtain
Lay your curtain on a flat area, and measure the top so you have the finished width. Divide this number by the number of shower curtain rings you have purchased. Using straight pins, mark the top edge in this interval so you will know how to space your shower curtain rings. Pinning first can save you a lot of aggravation if your measuring is off a bit. Then just clamp the shower curtain rings where each pin is, and remove the pins when you have it just right. Slide the rings over the shower curtain rod.
If you want your shower curtain to be waterproof, use any commercial waterproofing agent. Check with your local fabric store or your local camping and outdoor supply store.