Covers For Outdoor Gas Grills

This guide cuts through the options to help you find the right cover for your outdoor gas grill — protecting your investment from rain, UV damage, and debris year-round. Picking the correct fit takes under ten minutes once you know what to look for, and the process is straightforward even if you've never bought a grill cover before. Whether you run a freestanding burner or a built-in setup like those covered in the Best Gas Grills For Outdoor Kitchen (2026) guide, the right cover is one of the simplest upgrades you can make to extend the life of any grill in the natural gas outdoor grill category.

What you need

Grill cover sized to your unit — measure total width, depth, and height of your grill (including side shelves in the open position if they stay out) before purchasing; a cover that is too short will expose the burner box and legs to moisture
Measuring tape — a standard 25 ft. tape is sufficient; measure at the widest and tallest points, including handles and knobs
Soft cloth or microfiber towel — wipe down the grill surface before covering to prevent trapping grease and moisture underneath, which accelerates rust
Mild degreaser or dish soap — for cleaning residue off the lid and side shelves prior to covering; avoid abrasives on stainless panels
Bungee cords or tie-down straps (optional) — useful in high-wind areas to secure the cover at the base rail; look for covers with built-in straps or hem cords as a cleaner alternative
UV-resistant, waterproof cover material — heavy-duty polyester (600D or higher) or marine-grade vinyl performs best for natural gas outdoor grills left on a patio year-round; avoid thin 150D covers for anything larger than a two-burner unit
Grill-compatible natural gas connection knowledge — if you are covering a built-in unit in an outdoor kitchen, confirm the cover does not obstruct the gas shutoff valve or quick-disconnect fitting, which must remain accessible

Step-by-step

Measure your grill before buying a cover. Use a tape measure to record the width, depth, and height of your grill with the lid closed and side shelves folded down, because a cover that is even a few inches too short will leave the burner valves or legs exposed to rain and UV damage.
Choose a cover material matched to your climate. Heavy-gauge 600D polyester with a PVC backing handles rain and UV well in most regions, while marine-grade vinyl is worth the extra cost if you live near saltwater or in a high-humidity area where mold is a persistent problem.
Clean the grill thoroughly before covering it. Brush the grates, wipe down the exterior, and empty the grease trap so that trapped moisture and grease residue cannot accelerate rust or attract pests under the cover during storage.
Allow the grill to cool completely — at least one hour after the last use — before pulling the cover on. Covering a warm grill traps steam inside, which condenses into liquid water and defeats the entire purpose of waterproof protection, and can warp softer cover materials.
Position the cover so all vents, seams, and drainage points align correctly. Most quality covers have reinforced vent patches near the base; placing these correctly lets humidity escape rather than pool, which is the primary cause of rust on natural gas outdoor grills left covered for long periods.
Secure the cover using its tie-down straps, buckles, or elastic hem. Wind can lift an unsecured cover off a 700-dollar grill overnight, so cinch every fastener snugly without overtightening, which can stress seams and cause premature tearing.
Inspect the cover every two to four weeks for pooled water, mold spots, or chafing. Water that ponds on top of a flat cover adds weight that stresses the seams and can drip directly onto the burner tubes through any small gap, so redistribute or shake off standing water promptly.
Remove the cover during extended dry or sunny periods to air the grill out. Leaving any cover on continuously in warm weather traps ambient humidity and heat, accelerating metal oxidation — especially important if your grill is connected to a built-in outdoor kitchen setup where airflow is already restricted on three sides.
Clean the cover itself at least once per season. Scrub it with mild soap and water, rinse thoroughly, and let it dry completely before re-installing, because dirt and mold embedded in the fabric degrade the waterproof coating and shorten the cover's effective lifespan significantly.

Common pitfalls

Buying a cover sized for the grill body, not the full footprint. Side shelves, side burners, and rotisserie motor mounts add 6–12 inches to the width of most heavy-duty natural gas grills. Measure width with shelves deployed, then choose a cover that matches — or confirm the cover is explicitly rated for folded-shelf dimensions if you plan to store shelves down.
Using a fully sealed cover on a grill that hasn't cooled completely. Trapping residual heat above roughly 120°F degrades most polyester and vinyl covers from the inside out, accelerating delamination at the seams. Wait at least 45–60 minutes after the last burner is off before covering — longer in high-ambient-temperature climates.
Ignoring UV rating on covers for uncovered patios. A cover rated for 300-denier polyester without a UV inhibitor can fade and crack within a single season in direct sun. Look for covers explicitly listing UV-resistant or UV-stabilized coating, not just "weather-resistant," which typically refers to water resistance only.
Skipping the vented cover on a natural gas outdoor grill that stays connected to the gas line. Non-vented covers trap moisture underneath, which accelerates rust on cast iron grates and burner ports. Vented covers allow airflow that prevents condensation buildup — a critical feature if the grill sits through rain seasons without being moved.
Assuming one cover fits across a brand's full lineup. A 4-burner and a 6-burner version of the same grill model from the same manufacturer can differ by 10 or more inches in total length. Always cross-check the cover's stated interior dimensions against your specific model number, especially if you have an outdoor kitchen built-in configuration that alters the standard cabinet height.

When to call a pro

If a cover installation requires routing or securing the grill to a fixed outdoor kitchen structure, modifying a gas line connection, or addressing corrosion damage on the burners or firebox that a cover alone cannot solve, stop and call a licensed technician — those jobs carry real safety consequences if done wrong. A cover handles weather protection, not mechanical or gas-system problems, so if the underlying grill is malfunctioning, get it inspected before covering it up. If you're also reconsidering the grill itself, the guides on best gas grills for outdoor kitchens and best outdoor natural gas grills are worth reviewing before making any further investment.

Frequently asked questions

What size cover do I need for my outdoor gas grill?

Measure your grill at its widest points — width, depth, and height — with the lid closed and any side shelves folded down or extended, depending on how you store it. Add roughly two to four inches to each dimension so the cover drapes past the edges and doesn't sit tight against the burner vents. A cover that fits too snugly traps condensation underneath, which accelerates rust on cast iron grates and burner tubes. Most manufacturers list cover dimensions separately from grill dimensions, so cross-check both before buying. If your grill is built into an outdoor kitchen island, see the options discussed in Best Gas Grills For Outdoor Kitchen (2026) — island grills typically need a partial cover or a trim-to-fit solution rather than a full hood cover.

What material holds up best for a heavy-duty grill cover?

600-denier polyester with a PVC or polyurethane lining is the most common construction for durable covers and strikes a practical balance between weather resistance and breathability. Full PVC covers are more waterproof but trap moisture and can crack in sustained cold. Canvas and solution-dyed acrylic fabrics breathe better and resist UV fading longer, making them the better choice in climates with intense sun or high humidity. Whatever material you choose, look for reinforced seams at the corners and a hem with elastic or a draw-cord — those are the first failure points on any cover.

How do I stop my grill cover from blowing off in the wind?

Covers with a draw-cord hem or buckle straps that cinch under the grill frame are the most reliable in windy conditions. If your current cover lacks these, a bungee cord looped through the hem grommets and around a lower rail works as a stopgap. Avoid velcro-only closures on any grill that sits in an exposed location — velcro fills with grit and loses grip quickly. For natural gas grills connected to a fixed line, the gas hose itself can sometimes act as an anchor point if the cover has a side access hole with a cinch closure.

My cover is developing mold and mildew — what's causing it and how do I fix it?

Mold grows when a cover is put on a warm or wet grill and moisture has no escape path. Let the grill cool completely and wipe down any grease or moisture before covering it. Periodically lift the cover on dry, breezy days to air out the interior. To treat existing mold, brush off loose spores outdoors, then scrub the cover with a solution of one part white vinegar to three parts water or a diluted oxygen bleach cleaner — avoid chlorine bleach on coated fabrics as it degrades the waterproof layer. Rinse thoroughly and allow the cover to dry completely in the sun before putting it back on the grill. If mold has penetrated the inner lining, the cover's water resistance is likely compromised and replacement is the better call.

Does a grill cover work for a natural gas grill with a permanent hose connection?

Yes, but you need a cover designed with a gas hose cutout or a side vent that accommodates the supply line without forcing you to crimp or bend the hose. Running a hose under a tight cover hem puts stress on the connection fitting over time. Most covers marketed for natural gas outdoor grills include a side notch or a drawstring opening sized for a standard flex connector. If yours doesn't, cutting a small notch at the hem and reinforcing the edge with seam sealant is a straightforward modification. Always verify the hose and regulator are fully dry before covering, since trapped moisture at the fittings can contribute to corrosion.

How often should I replace my outdoor grill cover?

A quality cover in average conditions typically lasts three to five years. Inspect it each season for cracked seams, delaminating inner coatings, and UV-bleached or brittle fabric — any of these mean the cover is no longer doing its job. Covers in coastal environments, or anywhere with salt air, ultraviolet intensity, or temperature extremes, wear faster and may need replacing every two to three years. A failing cover can do more harm than no cover at all if it traps water against the grill body, so err toward replacing it when in doubt. For more context on which grill types benefit most from cover protection, the full guide at Natural Gas Outdoor Grills — Best Picks, Reviews & Guides is worth reviewing.

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