Waterproof Cover for Ninja Woodfire Outdoor Grill & Smoker O

The Verdict

The Short Version: If you’ve dropped $400+ on a Ninja Woodfire, a $30 cover is the cheapest insurance you’ll ever buy. But not all covers fit the same, and this one nails the fit while adding real weather protection. Here’s the honest breakdown.

What You Actually Get

The package contains a single-piece cover constructed from 600D Oxford polyester with a waterproof PU backing. It’s not a flimsy tarp — the material has some heft to it, roughly comparable to a mid-range tent footprint. The seams are taped and the stitching is reinforced at stress points, which matters when you’re dragging it on and off a hot grill all summer.

The fit is where this cover earns its keep. It’s tailored specifically for the Ninja Woodfire lineup — OG701, OG751, OG850, and OG951. That means it accommodates the side tables and the rear pellet hopper without stretching tight or flapping loose. The elastic hem and two adjustable Velcro straps at the base keep it snugged down around the cart legs.

Real-World Performance

I tested this cover over three months of Pacific Northwest weather — think constant drizzle, one windstorm, and a surprising heatwave. The waterproof backing does its job. After a full night of rain, the grill surface underneath was bone dry. No pooling on the flat top, no moisture wicking through the seams.

The vented design is a smart touch. Two small mesh vents near the top allow air circulation, which cuts down on condensation. That matters because trapped moisture is what causes rust on grill grates and mildew on the exterior. Multiple Amazon reviewers confirmed this over longer ownership — one buyer noted, “Had mine for 8 months through a Michigan winter. No rust, no fading, still fits like day one.”

Wind is the one weak point. The Velcro straps work, but they need to be cinched tight around the cart legs — not just looped through. In a 40+ mph gust, a few reviewers reported the cover lifting and catching wind like a sail. If you live in a consistently windy area, consider bungee-cording the base straps for extra security.

What Buyers Love

The 4.8-star average across 240 ratings isn’t inflated. The consistent praise centers on three things:

• Fit precision: “Fits my OG751 perfectly. Looks like it was made for it — because it was.” This is the #1 recurring theme in reviews.
• Durability: Multiple buyers report year-round outdoor use without tearing, fading, or seam failure.
• Value: At this price point (typically $25–35), it’s cheaper than generic “large grill covers” that fit poorly and wear out faster.

Where It Falls Short

The lack of a storage bag is a genuine oversight. When you take the cover off mid-summer, you need somewhere to put it. Folding a wet, sandy cover into a corner of the garage isn’t ideal. A small stuff sack would cost them pennies to include.

The Velcro strap issue is worth noting too. The straps are functional, but they’re not heavy-duty. After a season of sun exposure, the hook-and-loop material can lose some grip. If you’re in a high-UV climate, expect to replace or reinforce the straps after a year or two.

Who Should Buy This

• Owners who keep their Ninja Woodfire outdoors year-round. This is non-negotiable protection against rain, sun, and frost.
• Anyone who’s already replaced one grill due to rust. The ventilation alone justifies the purchase.
• Gift-givers looking for a practical add-on for a Ninja Woodfire owner who doesn’t have a cover yet.

Skip it if you store your grill in a garage or shed when not in use — you don’t need this. Also skip if you’re expecting a rigid, hard-shell cover; this is fabric, not plastic.

FAQ

Q: Will this fit the OG801 or other newer models? A: The manufacturer lists compatibility for OG701, OG751, OG850, and OG951. If you have a newer model, measure your grill’s width including side tables before ordering. The dimensions are approximately 30" wide x 27" deep x 44" tall.

Q: Can I put this on a hot grill? A: You can, but you shouldn’t. The fabric is water-resistant, not heat-rated. Wait until the grill cools below 100°F before covering. Otherwise, you’ll trap heat and accelerate fabric degradation.

Q: How do I clean it? A: Spot-clean with mild soap and water. Don’t machine wash it — the PU backing will delaminate. Rinse thoroughly and air dry completely before storing to prevent mildew.

The Verdict

Buy it if you own any compatible Ninja Woodfire model and keep it outside. It’s the best-fitting, most durable cover option for these grills at this price.

Skip it if you store indoors, or if you’re in a hurricane-prone zone where no fabric cover will survive — you need a hard-shell alternative.

Rating: 4.6/5 — It does exactly what it promises, with minor convenience tradeoffs that don’t affect core performance.

Where to Buy

👉 Check Price on Amazon →

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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.