Sea Craft 21 Specifications
- Length Overall (LOA): 21'0"
- Beam: 8'0"
- Dry Weight: ~2,400–2,700 lbs
- Engine: Single outboard, up to 225 hp
- Fuel Capacity: 95 gallons
- Draft: ~15"
- Hull Type: Fiberglass deep-vee with variable 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 21'0" Sea Craft 21 Open Fisherman 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 Sea Craft 21 T-Top cover is crafted from 9oz solution-dyed marine fabric as the standard option, with 7oz solution-dyed and premium Sunbrella acrylic also available. Solution-dyed fabric holds its color for 5–7 years, while Sunbrella acrylic extends that to 8–10 years of UV and mildew resistance.
Yes. The Sea Craft 21 T-Top cover is pattern-cut with reinforced cutouts that wrap cleanly around the T-Top support legs. The hardtop remains exposed for ventilation while the cover protects the hull, console, and cockpit below the hardtop.
Installation takes under 5 minutes with no tools required. Drape the cover over the Sea Craft 21 Open Fisherman’s cockpit, align the T-Top cutouts around the support legs, and secure using the adjustable strap-and-buckle system. The hem cord locks at the rubrail for a snug fit.
Absolutely. The Sea Craft 21 T-Top cover is reinforced for trailering at highway speeds. The hem cord, tie-down straps, and double-stitched seams keep the cover locked tight during transit — no flapping or shifting even at speed.
Yes. The Sea Craft 21 T-Top cover creates a complete barrier over the console, flush-mount electronics, leaning post, and all cockpit upholstery. The water-repellent, UV-resistant fabric blocks rain, salt spray, bird droppings, and sun damage.
Every Sea Craft 21 T-Top cover includes a 2-year manufacturer warranty covering defects in materials and workmanship. The solution-dyed marine fabric is rated for 5–7 years and Sunbrella acrylic for 8–10 years of outdoor performance.
The Sea Craft 21 T-Top cover is water-resistant with a DWR (durable water repellent) treatment that causes water to bead and roll off. The breathable fabric prevents trapped moisture and mildew — important for protecting the 21’s self-bailing cockpit and electronics.
Yes. The Sea Craft 21 T-Top cover fits all standard production model years equipped with a factory or aftermarket T-Top. Sea Craft maintained consistent hull dimensions throughout production, so the cover provides a precise custom fit regardless of year.
The 9oz solution-dyed fabric is available in Navy, Black, and Charcoal. Upgrading to Sunbrella acrylic unlocks an expanded palette including Captain Navy, Black, Charcoal, Pacific Blue, Forest Green, and additional colors.
Yes. Every Sea Craft 21 T-Top cover ships free via standard shipping across the continental United States. Orders typically ship within 1–2 business days.
⏱️ Current lead time: 1–3 weeks — every cover is custom-made for your boat.
Questions about fit? Call (561) 677-2628
Questions about fit? Call (561) 677-2628
Sea Craft 21 T-Top Boat Cover — Open Fisherman Offshore Guard
The Sea Craft 21 Open Fisherman packed serious offshore capability into a trailerable package. Built on Carl Moesly’s variable deadrise hull — the design he pioneered in Fort Lauderdale starting in 1961 — this 21’0″ center console carries a full 8’0″ beam, roughly 2,400–2,700 lbs of no-wood fiberglass construction, and up to 225 hp on a single outboard. With 95 gallons of fuel and 24 inches of freeboard aft, the 21 was marketed as one of the largest boats in its class, and it backed up that claim with a hull that tracked straight through offshore chop. A custom-fitted cover from center console boat covers at Perfect Fit protects every inch of the 21’s cockpit, console, and fishing station from sun, rain, and salt corrosion.
Tailored to the 21’s Wide-Beam Fishing Platform
This cover is pattern-cut to the Sea Craft 21’s generous 8-foot beam and center console layout, with reinforced T-Top cutouts that wrap around the support legs without binding. The design accounts for the 21’s self-bailing cockpit scuppers, flush-mount electronics area, bow cleats, and hawse pipes — every component stays protected while the cover maintains its shape. Installation is a one-person job: drape, align the T-Top cutouts, strap, and buckle in under five minutes. The reinforced hem cord seats at the rubrail and the adjustable tie-down straps hold tight for trailering at highway speed, aided by the 21’s manageable ~15-inch draft for easy ramp access. The Sea Craft 23 T-Top cover provides the same fit precision for the next size up.
Fabric That Outlasts the Elements — Just Like the Hull
Sea Craft built the 21 with solid fiberglass bottom, cored sides, and no wood to rot. The cover fabric follows the same philosophy of longevity — 9oz solution-dyed marine fabric lasts 5–7 years with water-repellent DWR treatment and mildew resistance, while Sunbrella acrylic extends protection to 8–10 years with superior fade resistance. Double-stitched seams handle the stress of trailering and weather exposure, and the breathable weave prevents trapped moisture underneath. Every Sea Craft 21 T-Top cover ships with a 2-year manufacturer warranty and free standard delivery across the continental U.S. For owners exploring hull protection beyond the cockpit, Sea Craft’s flagship 32 receives the same custom-fitted treatment for serious offshore rigs.
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