Seamaster 813 Boat Cover Guide: Sizes, Materials & Prices

Introduction: Why Your Seamaster 813 Deserves a Bespoke Cover

Welcome, fellow Seamaster 813 owners, to the ultimate guide for choosing the perfect bespoke boat cover. Your magnificent 26-foot vessel, with its generous 9-foot beam, is a familiar sight gracing the beautiful waters of the Thames, Broads, and Grand Union Canal. Protecting this cherished investment is paramount, and a high-quality, custom-fit cover is your boat's first line of defence against the unpredictable British weather and environmental elements. At UK Boat Covers, a family-run business based in Carterton, Oxfordshire, we understand the unique requirements of your Seamaster 813. We're here to ensure your boat remains pristine, season after season, with our expertly crafted covers. You can expect our bespoke Seamaster 813 covers to start from just £1,089 for PVC, and £1,199 for premium Acrylic, offering unbeatable value and protection.

Why Choose a Bespoke Cover for the Seamaster 813?

The Seamaster 813's distinctive 26-foot length and prominent 9-foot beam mean that a generic, off-the-shelf cover simply will not provide adequate protection. These mass-produced options often sag, flap excessively in the wind, or fail to cover critical areas, leading to water pooling, mould growth, and premature wear on your boat's interior and exterior. A bespoke cover, precisely tailored to the unique contours of your Seamaster 813's hull shape, deck layout, and specific fixtures, ensures a drum-tight fit that minimises stress points and maximises longevity. Our meticulous approach, often utilising our unique postal copy service, guarantees an exact replica of your original cover, perfectly accommodating every curve and dimension, providing unparalleled defence against the elements and keeping your cherished Seamaster 813 in prime condition for years to come.

See our Seamaster 813 model page for full specifications and cover options.

Cover Types Available for the Seamaster 813

For your Seamaster 813, navigating the Thames, Broads, or Grand Union Canal, several cover types offer tailored protection. A full canopy cover extends over the entire cockpit, ideal for extended cruising, providing shelter from sun and rain while offering privacy. Tonneau covers are excellent for securing the cockpit when docked or not in use, offering a sleek, low-profile barrier against ingress. Cockpit covers focus purely on sealing the open-air cockpit area, often used for overnight stops or during inclement weather. Spray hoods provide essential protection at the helm, deflecting wind and spray during navigation. Finally, a robust winter cover is indispensable for off-season storage, safeguarding your 26-foot Seamaster 813 from harsh conditions, ensuring it remains in impeccable condition ready for your next adventure on the water.

• Full Boat Canopy - Complete weather protection
• Tonneau Cover - Cockpit and deck coverage
• Cockpit Cover - Targeted cockpit protection
• Spray Hood - Windscreen and helm shield
• - Seasonal protection

Best Materials for Seamaster 813 Covers

Choosing the right material for your Seamaster 813 cover is crucial, particularly given its use on inland waterways like the Thames and Broads. We primarily offer two outstanding options: PVC marine fabric and Acrylic fabric. PVC is renowned for its exceptional waterproofing capabilities, making it an ideal choice for heavy rain and long-term exposure, offering robust protection at a cost-effective price point. Acrylic, on the other hand, boasts superior breathability, preventing condensation and mildew build-up, which is especially beneficial in humid UK climates. It also offers excellent UV resistance, prolonging the life of your boat's interior. While PVC offers fantastic durability, Acrylic generally provides a longer lifespan and maintains its aesthetic appeal for extended periods, making it a premium choice for your 26-foot Seamaster 813.

Compare materials in detail: Our fabrics page | Material comparison guide

Measuring Your Seamaster 813 for a New Cover

Accurately measuring your Seamaster 813 for a new cover can be a daunting task, even for experienced boat owners. While general measurements like the 26-foot length and 9-foot beam are a starting point, a bespoke cover requires far more precision. You'd typically need to measure from bow to stern, along the widest point (beam), and various heights for canopy support, accounting for windscreens, grab rails, and other deck fittings. However, even with the utmost care, measuring errors can occur, leading to a less-than-perfect fit. This is precisely why we champion our hassle-free postal copy service for your Seamaster 813. By simply sending us your old cover, we guarantee an exact, flawless replication in new marine-grade fabric, eliminating all measuring concerns and ensuring a truly custom fit every time.

Need help? See our size guide or use our postal copy service to skip measuring entirely.

Seamaster 813 Cover Prices

Investing in a bespoke cover for your Seamaster 813 offers unparalleled value and protection. At UK Boat Covers, our pricing is transparent and competitive, starting from £1,089 for a durable PVC cover and £1,199 for a premium Acrylic option. The final price can vary slightly depending on the specific cover type (e.g., canopy vs. tonneau) and any additional bespoke features you require. What truly sets us apart, however, is our unique advantage: as a small, family-run business in Carterton, Oxfordshire, we don't charge VAT, effectively saving you a significant 20% compared to many competitors. This means you receive a superior, custom-made cover for your 26-foot Seamaster 813 at a price that often rivals or beats mass-produced alternatives, offering far greater longevity and protection than any universal cover could ever hope to achieve.

View full price list | Request a personalised quote

How to Fit a Cover on Your Seamaster 813

Fitting your new bespoke Seamaster 813 cover, especially a canopy, requires a thoughtful approach to ensure optimal protection. Begin by identifying key attachment points on your 26-foot vessel, such as the windscreen frame, grab rails, and cockpit coaming. Our custom covers are designed with these specific Seamaster 813 features in mind, incorporating precise fastenings and eyelets. When installing, start from the bow, working your way aft, ensuring a snug fit over all contours and around any existing poles or supports to prevent water pooling. Proper tensioning is crucial; too loose, and it will flap; too tight, and it risks tearing. Always ensure adequate ventilation to prevent condensation, particularly when moored on the Thames or Broads, helping to maintain a dry and healthy interior for your 9-foot beam boat.

Caring for Your Seamaster 813 Cover

To maximise the lifespan of your Seamaster 813 cover and keep it performing optimally, regular maintenance is key, especially given the environmental factors on the Thames, Broads, and Grand Union Canal. At least once a season, give your cover a thorough clean with a mild soap and warm water, using a soft brush to gently remove dirt, bird droppings, and any algae build-up common to inland waterways. Avoid harsh chemicals or pressure washers, as these can damage the fabric's waterproofing and UV protection. Ensure the cover is completely dry before folding and storing it for the winter months in a cool, dry place. Regularly check for any minor tears or loose stitching; prompt repairs can prevent small issues from becoming major problems, significantly extending the life of your 26-foot Seamaster 813's protective covering.

More tips: Cleaning guide |

Our Postal Copy Service for Seamaster 813 Owners

Our revolutionary postal copy service is designed to provide Seamaster 813 owners with a perfectly tailored boat cover, without the need to bring your 26-foot vessel to our workshop in Carterton, Oxfordshire. The process is remarkably straightforward: simply post us your existing Seamaster 813 cover. Once it arrives, our skilled team, led by Ryan, meticulously uses your old cover as a precise template to cut and craft a brand-new, marine-grade replacement. This ensures an exact, 'like-for-like' fit, incorporating every unique curve and fixture of your 9-foot beam boat. Within an impressive 6 working days of receiving your old cover, your bespoke new one is expertly made and dispatched straight back to you, ready to provide superior protection. It's the ultimate convenient solution for a guaranteed perfect fit, every single time.

1. Post your old cover to UK Boat Covers, Carterton, Oxfordshire
2. We create a perfect copy using your old cover as a template
3. Choose PVC or Acrylic marine-grade fabric
4. Receive within 6 days via tracked UK delivery

Learn more about our postal service