As the yachting season winds down and colder months approach, proper winterisation becomes essential to protect your superyacht tender. Often overlooked, tenders are typically used for everything from guest transfers to water sports. Therefore, without adequate care, winter conditions can cause costly damage, reduce performance, and shorten the lifespan of your tender.

Whether you own one or multiple superyacht tenders, preparing them for storage during the off-season ensures they’re ready to perform flawlessly when the new season begins. Below are some essential tips for “winterising” your superyacht tender and safeguarding your investment.

1. Engine and Mechanical Systems

The engine is the heart of any superyacht tender, and cold weather can be particularly harsh on mechanical systems.

Start by flushing the engine with fresh water to remove salt, debris, and other residues that can cause corrosion to the internal components. Once this is clean, replace the engine oil and filters to prevent moisture build-up and rust during storage.

It’s also advisable to top up fuel tanks and add a stabiliser. This prevents condensation inside the tank and keeps the fuel from breaking down over time. Don’t forget to inspect belts, hoses, and gaskets for wear, and replacing anything that looks brittle before the tender goes into storage for the Winter.

For performance-driven tenders such as the MasterCraft XT Series or the XStar Wakeboard Boat, meticulous engine maintenance is vital. These boats deliver exceptional power for watersports and guest enjoyment, so ensuring the mechanical systems are winter-ready helps protect both performance and reliability.

2. Battery Care

Batteries are often times the first casualties of winter storage. To protect your superyacht tender, disconnect the batteries and store them in a cool, dry place. It is also important to regularly recharge them over the winter months to maintain health and avoid the dreaded dead battery come springtime.

For lithium battery-powered tenders, check the manufacturer’s storage guidelines as these can differ from traditional lead-acid batteries. Proper care extends battery lifespan and ensures your tender powers up reliably when needed.

Models like the MasterCraft NXT Series, which offer accessible, versatile tender options for superyacht owners, also benefit from diligent battery care, primarily when they’re frequently used to support multiple activities onboard.

3. Hull and Exterior Protection

Salt, grime, and marine growth can wreak havoc on a tender’s hull if left untreated. 

To prevent this, thoroughly clean the exterior, paying close attention to the waterline and underbody. For inflatable tenders, use a mild soap that won’t damage the tubes, and apply a UV-protective conditioner to prevent cracking during storage.

Inspect the hull for chips, cracks, or scratches, and perform any necessary repairs before storing the tender. This not only keeps the superyacht tender looking pristine but also prevents small issues from turning into costly structural problems later.

Premium tenders such as the MasterCraft X Series, known for their striking design and luxury finishes, require extra care to preserve their appearance. Regular hull cleaning and exterior protection keep them looking as impressive as the day they were launched.

4. Interior and Upholstery

Moisture build-up is the enemy of interior fittings and upholstery. Remove all soft furnishings, cushions, and any fabric elements from the tender before winter. Clean and dry them thoroughly before storing them in a climate-controlled environment.

For built-in upholstery, wipe down surfaces with a mild cleaner and ensure everything is completely dry. Consider using moisture-absorbing packets or dehumidifiers inside the tender to reduce the risk of mould and mildew.

Boats like the MasterCraft NXT Series and XT Series often feature plush, spacious seating that deserves special attention during winterisation. Protecting these interiors ensures guests continue to enjoy premium comfort when the season reopens.

5. Electrical and Safety Equipment

Check all onboard electronics and safety gear before storage. Navigation systems, radios, and lighting should be tested and cleaned. Store delicate electronics indoors if possible. Safety equipment, such as life jackets, flares, and fire extinguishers, should also be inspected to ensure they’re up to date and ready for the next season.

Properly maintained safety equipment isn’t just a legal requirement for superyacht tenders, but it’s also vital for guest and crew wellbeing.

High-performance tenders, such as the MasterCraft XStar and ProStar Ski Boat, are equipped with advanced systems. Therefore, a careful inspection of electrics and electronics ensures everything operates reliably once spring arrives.

6. Storage Conditions

Where and how you store your superyacht tender over winter is just as important as the preparation itself. Indoor storage in a temperature-controlled facility offers the best protection, shielding your tender from frost, UV damage, and moisture.

If indoor storage isn’t an option, invest in a high quality cover that fits snugly to protect against rain, snow, and debris. Ensure the cover is breathable to prevent moisture build-up underneath.

Compact, performance-oriented tenders like the MasterCraft ProStar Ski Boat are particularly convenient for storage. Their manageable size and streamlined build make them easier to protect while still offering reliable, premium service to superyacht owners.

7. Professional Servicing

While many owners and crew take on winterisation themselves, scheduling a professional service adds peace of mind. Certified marine technicians can conduct a thorough inspection, identify hidden issues, and ensure your superyacht tender is properly prepared for hibernation. Regular servicing extends lifespan and guarantees optimal performance.

When working with premium models such as the MasterCraft XT or X Series, professional servicing is strongly recommended, as these vessels combine advanced technology and high-performance engineering that benefit from expert attention.

Contact MasterCraft Today

Your superyacht tender is an integral part of the luxury yachting experience whether it’s ferrying guests ashore, exploring hidden bays, or supporting water sports. Proper winterisation protects your investment, reduces the risk of unexpected repairs, and ensures your tender is ready to perform the moment warmer weather returns.

By taking the time to winterise your superyacht tenders, you not only preserve their appearance and function but also ensure they remain a reliable extension of your superyacht lifestyle season after season.

With high-quality options from MasterCraft from the versatile NXT Series to the luxury X Series, the powerful XT Series, or compact ProStar Ski boat you can select the perfect tender to meet your needs and enjoy confidence knowing that, with the right care, they’ll always deliver.

Get in touch with MasterCraft Boats UK today for more information, advice, or to be a step closer to your dream superyacht tender in preparation for 2026!