Jupiter 31 Specifications
- Length Overall (LOA): 31'0"
- Beam: 9'6"
- Dry Weight: ~6,690 lbs
- Engine: Twin outboards, max 450 HP
- Fuel Capacity: 260 gallons (standard); up to 365 gal with auxiliary
- Draft: ~22"
- Hull Type: Deep-V with Posi-Stern hull pad, 24° deadrise aft
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 31'0" Jupiter 31 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 | 43 lbs |
|---|
Install
Please watch the video below for installation instructions!
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Frequently Asked Questions
The Jupiter 31 cover is available in 9oz solution-dyed marine fabric or premium Sunbrella acrylic. The 9oz option delivers 5–7 years of UV and weather resistance, while Sunbrella extends that to 8–10 years. Both are water-repellent, mildew-resistant, and fade-resistant.
Yes. The cover is pattern-cut with reinforced cutouts that wrap around the T-Top support legs. The hull below the hardtop is fully covered while the fiberglass T-Top roof remains exposed.
Installation takes one person under 5 minutes. Drape the cover from bow to stern, guide it around the T-Top legs, and secure with the strap-and-buckle system. The hem cord cinches at the rubrail for a complete seal.
Yes. The cover is reinforced at all stress points and designed for highway-speed trailering. The tie-down system keeps the cover secure at speed.
Yes. The cover provides full protection for the helm electronics, seating, livewells, fishbox, and all cockpit surfaces — blocking UV rays, rain, salt spray, and airborne debris.
Every Jupiter 31 cover includes a 2-year manufacturer warranty covering materials and workmanship. The fabrics are independently rated for 5–10 years of outdoor protection.
The cover is water-resistant with a DWR finish that repels water while remaining breathable. This prevents moisture from pooling underneath and causing mildew or mold issues.
Yes. This cover fits all Jupiter 31 model years with the standard 31-foot hull and factory T-Top configuration.
The 9oz solution-dyed fabric comes in Navy, Black, and Charcoal. Sunbrella acrylic offers an expanded selection. All colors are solution-dyed for long-term fade resistance in harsh marine environments.
Shipping is a flat rate per cover to anywhere in the continental United States, with most orders shipping within 1–2 business days.
Jupiter 31 T-Top Boat Cover — Deep-V Legacy Protection
The Jupiter 31 is a 31-foot deep-V center console with a 9’6″ beam, approximately 6,690 pounds dry weight, and twin outboard power up to 450 HP. Built with Jupiter Marine’s signature hand-laid fiberglass construction and a 3.5-inch thick composite transom, the 31 carries 260 gallons of fuel standard — with optional auxiliary tanks pushing total capacity to 365 gallons for extended bluewater range. The hull’s 24° deadrise and Posi-Stern pad bottom deliver the composed, confident ride that earned Jupiter its reputation among offshore tournament anglers. Protecting a boat this capable calls for a cover built to the same standard, and our complete line of boat shade kits and covers gives Jupiter owners options for every season.
Custom-Fitted to the Jupiter 31’s Proven Layout
This cover is pattern-cut for the Jupiter 31’s hull dimensions and T-Top configuration, with reinforced cutouts that wrap around the hardtop support legs while the fiberglass roof remains exposed above. The cover protects the helm station, leaning post, 50-gallon sole livewell, 30-gallon stand-up livewell, 465-quart insulated fishbox, and all cockpit surfaces from UV damage, rain, salt spray, and debris. Installation takes one person under five minutes with the strap-and-buckle system, and the cover handles highway trailering speeds. For Jupiter’s current-production mid-range platform, see our Jupiter 32 T-Top cover built for the triple-outboard successor.
Protection Worthy of a Premium Offshore Hull
Every Jupiter 31 cover is available in 9oz solution-dyed marine fabric rated for 5–7 years, or premium Sunbrella acrylic rated for 8–10 years. Both fabrics are water-repellent, mildew-resistant, and double-stitched at every seam. A hem cord seals the cover at the rubrail, and adjustable tie-down straps lock everything in place. Each cover ships with a 2-year manufacturer warranty. Jupiter owners looking for their largest platform will find the same craftsmanship in our Jupiter 34 T-Top cover designed for the flagship 1,050 HP center console.
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