Cobia 21 Bay Specifications
- Length Overall (LOA): 21'1"
- Beam: 8'4"
- Dry Weight: ~2,050 lbs
- Engine: Single outboard, max 200 HP
- Fuel Capacity: 55 gallons
- Draft: ~13"
- Hull Type: Shallow-draft bay boat, 15° deadrise
Cover Features
- Fabric Options: 9oz solution-dyed marine fabric or premium Sunbrella acrylic
- Coverage Type: T-Top cover wraps hull below hardtop; hardtop remains exposed
- Construction: Reinforced stitching, hem cord at rubrail, adjustable tie-down straps
- Durability: Solution-dyed fabric (5-7 years); Sunbrella acrylic (8-10 years)
- Fit: Custom-fitted to 21'1" Cobia 21 Bay specifications
- Protection: UV-resistant, water-repellent, weatherproof
Additional information
Choose Your Cover Fabric
7 oz. Polyester — Our entry-level marine cover fabric, woven from 100% polyester fiber at a 7 oz. per linear yard weight. This lighter option keeps the cover manageable for solo handling while still delivering reliable protection against sun, rain, and debris. Backed by a 3-year fabric warranty. Ships in Black.
9 oz. Polyester — Step up to our heavy-duty polyester, engineered at 9 oz. per linear yard for boats that face tougher conditions or extended outdoor storage. The denser weave adds an extra layer of defense against abrasion and weather without adding unnecessary bulk. Protected by a 5-year fabric warranty. Ships in Navy or Black.
Sunbrella® — For boaters who want the best, our Sunbrella covers use 100% solution-dyed acrylic — the same fabric trusted by marine professionals worldwide. Naturally resistant to fading, mold, and water damage, Sunbrella holds its color and integrity season after season. Covered by a 6-year fabric warranty. Ships in Black, Smoke, or Marine Blue.
Both polyester options feature solution-dyed construction, where pigment is infused into each fiber during production rather than applied to the surface afterward. This process locks color deep into the material, preventing any dye transfer to your boat’s gel coat or finish. The result is a cover that stays vibrant without bleeding or rubbing off. Our polyester is also designed to breathe — it allows moisture trapped underneath to vent out naturally, reducing the risk of mildew and keeping your boat dry. The fabric holds its form without sagging or stretching over time, stays lightweight enough for one person to handle, and stands up to prolonged UV exposure and harsh marine weather.
*The warranty periods above are provided by the fabric manufacturer and cover the material itself. For details on what’s included in the warranty for your completed cover, please see our warranty page.
7 oz. Polyester — Our entry-level marine cover fabric, woven from 100% polyester fiber at a 7 oz. per linear yard weight. This lighter option keeps the cover manageable for solo handling while still delivering reliable protection against sun, rain, and debris. Backed by a 3-year fabric warranty. Ships in Black.
9 oz. Polyester — Step up to our heavy-duty polyester, engineered at 9 oz. per linear yard for boats that face tougher conditions or extended outdoor storage. The denser weave adds an extra layer of defense against abrasion and weather without adding unnecessary bulk. Protected by a 5-year fabric warranty. Ships in Navy or Black.
Sunbrella® — For boaters who want the best, our Sunbrella covers use 100% solution-dyed acrylic — the same fabric trusted by marine professionals worldwide. Naturally resistant to fading, mold, and water damage, Sunbrella holds its color and integrity season after season. Covered by a 6-year fabric warranty. Ships in Black, Smoke, or Marine Blue.
Both polyester options feature solution-dyed construction, where pigment is infused into each fiber during production rather than applied to the surface afterward. This process locks color deep into the material, preventing any dye transfer to your boat’s gel coat or finish. The result is a cover that stays vibrant without bleeding or rubbing off. Our polyester is also designed to breathe — it allows moisture trapped underneath to vent out naturally, reducing the risk of mildew and keeping your boat dry. The fabric holds its form without sagging or stretching over time, stays lightweight enough for one person to handle, and stands up to prolonged UV exposure and harsh marine weather.
*The warranty periods above are provided by the fabric manufacturer and cover the material itself. For details on what’s included in the warranty for your completed cover, please see our warranty page.
| Weight | 31 lbs |
|---|
Install
Please watch the video below for installation instructions!
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Frequently Asked Questions
The Cobia 21 Bay cover is available in 9oz solution-dyed marine fabric rated for 5-7 years, a lighter 7oz option, or premium Sunbrella acrylic engineered for 8-10 years of UV and saltwater protection.
Yes. The cover is pattern-cut with reinforced cutouts that wrap around the T-Top support legs. The hardtop remains exposed while the fabric encloses the hull from the rubrail down.
Installation takes under 5 minutes solo. Drape the cover over the T-Top frame, secure the adjustable tie-down straps beneath the hull, and cinch the hem cord along the rubrail for a snug fit.
Absolutely. The cover is reinforced for highway-speed trailering. At just 2,050 pounds dry, the 21 Bay is frequently trailered, and this cover holds securely throughout transit.
Yes. The cover creates a complete barrier over the cockpit, shielding your console electronics, GPS, fishfinder, casting platform, and all upholstery from UV, rain, salt spray, and debris.
Every cover includes a 2-year manufacturer warranty covering defects in materials and workmanship, giving you confidence in long-term durability.
The fabric is water-resistant with a DWR (durable water repellent) finish that sheds rain and spray while remaining breathable to prevent trapped moisture and mildew.
This cover is designed for the Cobia 21 Bay with a factory-installed T-Top during its standard production run. If your 21 Bay has the original T-Top configuration, this cover will fit.
The 9oz solution-dyed fabric is available in Navy, Black, and Charcoal. The 7oz option adds additional color choices, and the Sunbrella line offers the widest color selection.
Yes. All orders ship free via standard ground shipping within the continental United States, typically arriving within 1-2 business days.
Cobia 21 Bay T-Top Boat Cover — Shallow-Water Specialist Protection
The Cobia 21 Bay is a purpose-built flats machine — 21’1″ long, 8’4″ beam, just 2,050 pounds dry, and a 15-degree deadrise paired with a 13-inch draft that lets you pole across grass flats most center consoles can’t touch. Powered by up to 200 horsepower, this Maverick Boat Group bay boat was designed in Fort Pierce, Florida, specifically for anglers who chase redfish, snook, and trout in skinny water. A custom-fitted cover from the Cobia collection protects the entire cockpit — casting platform, console, rod storage, and the 55-gallon fuel system — from the relentless subtropical sun and salt that break down unprotected boats in a single season.
Tailored to the 21 Bay’s Flat-Deck Layout
Unlike deeper-V center consoles, the 21 Bay has a wide-open flat deck with a low-profile center console and minimal obstructions — and this cover is cut to match that exact layout. Reinforced cutouts accommodate the T-Top support legs while the hardtop remains exposed for ventilation. The fabric extends below the rubrail to near-waterline coverage, sealing out rain, pollen, and UV during storage. Install it solo in under five minutes: drape over the frame, secure the adjustable tie-down straps, and cinch the hem cord tight. It holds securely for highway trailering — critical for a boat this light that’s constantly moving between launch ramps. If you fish the same waters in a center console configuration, the Cobia 21 Bay center console cover offers the same fit without the T-Top accommodations.
Marine-Grade Fabric for Bay Boat Punishment
Bay boats live harder than most — they sit on trailers in parking lots, bake on docks in 95-degree heat, and take daily salt spray from launches that barely clear the waterline. The 9oz solution-dyed marine fabric handles all of it for 5–7 years, while the Sunbrella acrylic upgrade pushes that to 8–10 years with superior fade resistance. Both are water-repellent, mildew-resistant, and breathable enough to prevent condensation damage underneath. Double-stitched seams and a 2-year manufacturer warranty complete the package. For anglers looking to step up to a deeper-V hull with more offshore range, explore the Cobia 220 cover for a versatile nearshore platform.
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