The right cover protects your furniture from sun, rain, and dirt without trapping moisture underneath
A patio furniture cover does two jobs: it shields your chairs, tables, and loungers from weather damage, and it keeps them clean so you spend less time scrubbing before you sit down. The cover itself matters less than how you use it. A tight, waterproof cover that lets moisture build up underneath will rot wood and rust metal faster than no cover at all. The goal is to block rain and UV rays while letting air circulate, which means choosing the right material for your climate and checking underneath periodically.
Most covers fall into three categories: fitted covers that wrap individual pieces, universal covers that drape over groups of furniture, and storage boxes that hold smaller items. Which one you need depends on what furniture you own, how much space you have, and whether you live somewhere with heavy rain, intense sun, or both.
Key Takeaways
- Waterproof covers with ventilation holes or breathable fabric prevent water from pooling and rotting wood or rusting metal underneath.
- Fitted covers work best for individual chairs and loungers; universal or custom covers work better for tables and grouped seating.
- Check under covers every few weeks, especially in humid climates, to catch mold or moisture buildup before it damages the furniture.
- Anchor covers with straps, ties, or weights so wind does not blow them off and expose your furniture to rain.
- Remove covers during warm, dry weather to let furniture dry out and prevent mildew from forming in damp pockets.
Fitted covers for individual chairs and loungers
A fitted cover wraps snugly around a single chair, chaise lounge, or ottoman and stays in place with elastic hems or drawstring closures. These work well because they use less fabric, dry faster than loose covers, and are easier to store when not in use. Look for covers made from polyester or polypropylene with a waterproof backing—these materials shed rain without absorbing it.
The trade-off is that fitted covers are harder to put on and take off, especially if your furniture has arms or legs that stick out at angles. Measure your furniture before you buy: width, depth, and height from the ground. A cover that is too small will tear when you stretch it on; one that is too large will sag and collect water in the folds. Most retailers sell fitted covers in standard sizes (small, medium, large) and also offer custom-made options if your furniture has an unusual shape.
Fitted covers with ventilation holes or mesh panels are better than solid covers in humid climates because they let air move through. If you live somewhere with high humidity or frequent rain, choose a cover that breathes rather than one that is completely sealed.
Universal and custom covers for tables and grouped furniture
A universal cover is a large rectangle or oval of fabric that drapes over a table and chairs as one unit. These are cheaper than buying individual fitted covers and faster to put on, but they do not fit as snugly, so wind can catch them more easily. They work well for patio sets that stay in one spot all season and for furniture you cover and uncover infrequently.
Universal covers come in standard sizes (4-person, 6-person, 8-person) based on table diameter or length. Measure your table and the height of your chairs with them pushed in, then add a few inches so the cover hangs down and protects the legs. A cover that reaches the ground is easier for wind to grab; one that stops a few inches above the ground is more stable.
If your furniture arrangement is unusual or you have a mix of pieces, a custom cover made to your exact dimensions is worth the extra cost. Companies that make custom covers will ask for measurements of your table, the number and type of chairs, and any other pieces you want covered. The cover arrives with straps or ties built in to anchor it against wind.
Materials that resist water without trapping moisture
The best cover materials are polyester, polypropylene, or canvas with a waterproof backing or coating. Polyester is lightweight, dries quickly, and resists mildew. Polypropylene is slightly heavier and more durable but takes longer to dry. Canvas is breathable, which means water can eventually soak through, so it works best in dry climates or for furniture you cover only during the off-season.
Avoid vinyl covers unless they have ventilation holes or mesh panels. Solid vinyl traps condensation underneath and creates the exact damp environment where mold grows. If you buy a vinyl cover, look for one with grommets (metal-ringed holes) spaced around the edges or a mesh panel on one side.
Check the cover's thickness in denier—a measurement of fabric weight. Covers rated 300 denier or higher will last longer and resist tearing. Anything below 200 denier is thin and will degrade faster in direct sunlight. If your patio gets intense afternoon sun, choose a cover with UV-resistant coating or a darker color, which absorbs less heat and fades more slowly.
How to anchor covers so wind does not blow them away
A cover that blows off in the wind is useless, and a flapping cover can damage the furniture underneath by letting rain in at odd angles. Most covers come with straps or ties that loop around furniture legs or attach to the frame. Use all of them, even if it seems like overkill. In areas with frequent wind, add additional anchors: bungee cords looped under the furniture, heavy-duty clips that clamp to the frame, or sandbags placed on top of the cover at the corners.
If your cover does not come with straps, you can add them yourself using nylon webbing and heavy-duty adhesive or by sewing them on. Measure from one side of the furniture to the other, add a few inches for overlap, and attach the strap so it pulls the cover tight against the frame. Velcro strips also work for lighter covers on furniture that does not move.
Check your anchors after wind or heavy rain. A strap that has loosened or shifted will let the cover flap, and a flapping cover lets rain underneath. Tighten or re-anchor as needed.
When to remove covers and let furniture breathe
Leaving a cover on all the time, even in good weather, creates a damp microclimate that encourages mold and mildew. Remove covers during warm, dry days—ideally once a week or every two weeks during the season—and let the furniture dry completely. This is especially important in humid climates or after rain.
If you notice dark spots, a musty smell, or visible mold under the cover, remove it when ready and let the furniture dry in the sun for several hours. Wipe down the furniture with a dry cloth and inspect the cover itself for mold. If the cover has mold, wash it with a mixture of one part white vinegar to three parts water, rinse thoroughly, and dry it completely before putting it back on.
In winter or during the off-season, covers should stay on to protect furniture from weather. But even then, check underneath every few weeks if you live somewhere with high humidity or frequent rain. Moisture can build up even under a cover, and catching it early prevents permanent damage.
Storage boxes and deck boxes for smaller pieces
If you have cushions, throw pillows, or small side tables, a storage box or deck box keeps them dry and organized without taking up much space. These boxes are waterproof, lockable, and come in sizes from 2 feet long to 6 feet or more. They work well for items you do not use every day or for storing covers themselves during the season.
Look for boxes with drainage holes in the bottom so water does not pool inside if the seal fails. Lift the lid occasionally to let air circulate, especially in humid weather. Store cushions and pillows in breathable bags inside the box rather than directly on the bottom, which can trap moisture.
A storage box is not a substitute for covering your main furniture pieces, but it is an efficient way to protect smaller items and keep your patio organized.
Frequently Asked Questions
Can I leave a cover on furniture all summer?
Not continuously. Covers trap moisture, which causes mold and mildew. Remove covers during warm, dry weather at least once a week or every two weeks, and let furniture dry completely in the sun. In humid climates, check underneath covers every few days.
What should I do if mold grows under a cover?
Remove the cover when ready and let the furniture dry in direct sunlight for several hours. Wipe the furniture with a dry cloth. Wash the cover with a mixture of one part white vinegar to three parts water, rinse it thoroughly, and dry it completely before using it again.
How do I keep wind from blowing my cover off?
Use all the straps and ties that come with the cover, and add extra anchors like bungee cords, heavy-duty clips, or sandbags at the corners. Check anchors after wind or rain to make sure they have not loosened. A cover that flaps lets rain underneath and defeats its purpose.
Do I need a different cover for winter storage?
A cover that works during the season works for winter too, but make sure it is clean and completely dry before you put it on for long-term storage. If you are storing furniture in a shed or garage, you may not need a cover at all—the structure protects it from weather.
What is the difference between waterproof and water-resistant covers?
Waterproof covers block water completely; water-resistant covers slow water down but eventually let it through. For patio furniture, waterproof is better. Look for covers made from polyester or polypropylene with a waterproof backing or coating, and avoid solid vinyl unless it has ventilation holes.