Indoor storage in a dry, ventilated garage or shed is the best protection for outdoor furniture in winter; if it must stay outside, use a fitted, breathable, waterproof cover on furniture raised off damp ground.
A wet cushion left under a cover for one winter can come out stained, mildewed, and smelling worse than the day you bought it. Protecting patio furniture in cold weather comes down to four moves done in order: clean it, dry it completely, store it dry, and if it stays outdoors, cover it with something that breathes. Get those right and even a full season of freezing rain does little damage.
Most ruined furniture fails for one reason — trapped moisture. Condensation forms under any cover, and once mold, mildew, and rust set in, wood swells, metal pits, and fabric never quite recovers. Here is exactly how to prevent that, step by step.
The Winterization Steps That Actually Protect Furniture
Clean every surface first, dry it fully, then store it — never cover anything while it is still wet. Skipping the dry stage is the most common mistake, and it is the one that causes visible damage by spring.
- Clear off debris. Remove leaves, twigs, and dirt from frames, slats, and crevices — that trapped plant matter holds moisture against the surface.
- Wash and rinse. Wipe frames with mild soap and water, and scrub any grime or organic film off plastic, metal, and wood.
- Dry completely. Let furniture air-dry in the sun, or towel it down, until no damp patches remain anywhere, including joints and legs.
- Remove cushions. Store cushions, pillows, and other fabrics separately indoors — dry, and ideally in a sealed bin or bag.
- Treat materials. Wood may need a manufacturer-recommended cleaner, sealer, or treatment before storage; metal benefits from a wipe-down that helps slow oxidation and corrosion.
- Secure covers. If furniture stays outside, cover it and tie or strap the covers down so wind cannot blow them off or work them loose.
Raising items off the ground matters as much as the cover. Polywood’s winterizing guidance recommends keeping furniture on a solid, dry surface, and any furniture left on soil, damp gravel, or poorly ventilated decking should instead sit on blocks, bricks, or planks. Move pieces away from roof drips and out from under dense trees that shed water and debris.
If you would rather start next season with pieces built to handle the cold, this roundup of outdoor furniture rated for winter weather saves you the guesswork.
How the Materials Change the Plan
Each material fails in its own way over winter, so the prep differs by type. Handling these differences properly is what separates furniture that survives from furniture that comes back warped, spotted, or rusted.
| Material | Winter Risk | Protection |
|---|---|---|
| Wood | Swelling, cracking from temperature swings | Clean and treat or seal as the maker recommends |
| Metal | Rust and corrosion from moisture | Clean and dry, then protect from oxidation |
| Wicker and rattan | Mildew in damp, unventilated air | Dry fully, store dry, avoid damp rooms |
| Fabric and cushions | Mildew, stains, set-in odors | Wash, dry fully, store indoors separately |
| Plastic and resin | Staining, brittleness in cold | Clean, dry, and cover or store as usual |
Cover Choice: Breathable Beats Waterproof Alone
A snug-fitting cover that blocks water but allows air circulation shields furniture best — sealed, non-breathable covers trap moisture and make the problem worse. Homes & Gardens winterizing guidance calls for fitted, weatherproof covers with mesh vents or airflow space, because condensation builds under anything airtight. The cover’s job is to keep rain off while letting damp air escape.
| Cover Type | What It Does | Verdict |
|---|---|---|
| Fitted, breathable cover | Blocks rain, vents moisture | Best choice |
| Sealed, non-breathable cover | Keeps water out, traps damp inside | Avoid moisture buildup |
| Loose tarp, untied | Rain protection, poor fit | Wind pulls it off |
Three cautions stick with any approach: never cover furniture while it is wet, never leave cushions under a wet cover, and never store pieces in a damp, unventilated space. On dry winter days, open covers briefly to let air move through — that single habit limits the condensation that does the real damage. House Beautiful’s organizing guidance makes the same point: a few minutes of ventilation beats a season of trapped moisture.
Common Questions
Can patio furniture stay outside all winter?
Yes, if it is cleaned, fully dried, raised off damp ground, and covered with a fitted, breathable, weatherproof cover. Furniture on soil, wet gravel, or poorly ventilated decking is the riskiest setup, so elevate it on blocks or planks first.
Is a waterproof cover enough on its own?
No. A cover that blocks water but traps air lets condensation, mold, and mildew build up underneath. Look for a breathable cover with mesh vents or airflow space, and secure it so wind cannot blow it loose.
Should cushions stay on the furniture under the cover?
No. Store cushions, pillows, and fabrics separately indoors, fully dry. Cushions left under a cover hold moisture against the frame and are the most common source of mildew, stains, and lingering odors.
Sources
- Polywood. “How to Winterize Patio Furniture in 4 Easy Steps” Supports the step-by-step winterizing process and raising furniture off damp ground.
- Homes & Gardens. “How to Protect Garden Furniture in Winter” Supports breathable, fitted cover guidance and airflow to reduce condensation.
- House Beautiful. “How to Winterize Your Outdoor Furniture” Supports cleaning, drying, and periodic ventilation to limit moisture damage.