Winterising a sailing boat: what needs to be done before winter ?
As the sailing season comes to an end, it is time to prepare your sailing boat for winter. Winterisation is an essential step in protecting your boat, safeguarding its equipment and reducing the risk of breakdowns or damage during several months of inactivity.
The engine, sails, rigging, batteries, water systems and onboard equipment all require special attention before winter sets in. Carrying out maintenance at the right time also helps you plan any necessary repairs and ensures that your boat is ready to sail again as soon as the warmer weather returns.
How can you properly winterise a sailing boat? Which checks should you carry out, and which equipment should you protect first? Here are the essential steps to prepare your boat for winter.
Why Is It Important to Winterise Your Sailing Boat Properly?
Winterising a sailing boat involves much more than simply leaving it in the marina or taking it out of the water until spring. It means preparing all its equipment for a period when it will be used very little, or not at all.
Moisture, salt, temperature fluctuations, frost and harsh weather can damage certain components. Without proper maintenance, the consequences can include corrosion of metal parts, damaged sails, flat batteries, mould inside the boat and damage to water systems.
Proper winterisation helps you to:
- Protect the boat’s equipment and spare parts.
- Reduce the risks associated with frost and moisture.
- Identify signs of wear before they become more serious.
- Plan repairs and replace defective parts.
- Make it easier to get the boat ready for use again in spring.
It is also the ideal time to review the sailing season and prepare for your next trips under the best possible conditions.
1. Choosing Between Dry Storage and Wintering Afloat
Before starting any maintenance work, you need to decide where your sailing boat will spend the winter. There are two main options: storing it ashore or keeping it afloat.
Wintering Ashore
The boat is lifted out of the water and placed on a suitable cradle or in a designated storage area.
This option makes it easier to inspect the hull, keel, rudder, propeller and other underwater components. It also allows you to carry out maintenance work, such as cleaning the hull or checking the antifouling coating.
However, storing the boat ashore does not eliminate the need to protect the engine, water systems and interior equipment against cold temperatures and moisture.
Wintering Afloat
The sailing boat remains in its berth at the marina throughout the winter.
In this case, regular inspections are particularly important. Mooring lines, fenders, bilge pumps and any potential water ingress must be checked regularly. You should also ensure that the equipment remains functional and that the boat is properly protected against bad weather.
Key takeaway: The choice between storing a boat ashore or keeping it afloat depends on the type of boat, its location, the weather conditions and the maintenance work required. In either case, proper preparation is essential.
2. Preparing the Engine and Checking Water Systems
The engine is one of the key components to check before winter. Even if you mainly sail under wind power, the engine needs proper maintenance to remain reliable.
Carrying Out Engine Maintenance
Start by consulting the manufacturer’s recommendations to determine which maintenance tasks are required for your engine model and type.
Depending on the applicable recommendations, maintenance may include:
- Changing the engine oil and replacing the filter.
- Checking belts, hoses and connections.
- Inspecting the cooling system.
- Checking the water pump impeller and relevant filters.
- Looking for signs of corrosion or leaks.
Protecting Water Systems Against Frost
Freshwater systems, tanks, water heaters and pipes must be prepared according to winter conditions and the manufacturers’ recommendations.
In areas exposed to freezing temperatures, the systems must be drained appropriately to reduce the risk of pipes cracking or bursting. If antifreeze is required, only use a product compatible with the system concerned, particularly when dealing with drinking water.
3. Cleaning and Inspecting the Sails
Sails are exposed to sunlight, salt, wind and friction throughout the sailing season. Winterisation is therefore the ideal time to inspect them and prepare them for storage.
Rinsing and Drying the Sails
If conditions allow, remove the sails from the boat. Rinse them with fresh water to remove salt deposits, then let them dry completely before folding them and storing them in a clean, well-ventilated place.
Avoid storing damp sails, as this encourages mould growth and can lead to persistent odours.
Use cleaning methods that are compatible with the sailcloth and follow the recommendations of your sailmaker or the sail manufacturer. Harsh cleaning products and high-pressure washing can damage certain materials.
Checking the Condition of the Sails and Accessories
Take this opportunity to inspect:
- Seams and areas subject to friction.
- Halyard, tack and clew points.
- Eyelets, reinforcements and reefing bands.
- The genoa’s UV protection strip.
- Slides, cars and other associated accessories.
Any wear identified in autumn can be repaired before the next sailing season begins. This helps prevent you from discovering a tear or weakness just as you are preparing to head out to sea.
Remember to rinse and dry sail covers, lazy bags and other fabric protection before storing them.
4. Inspecting the Rigging and Deck Hardware
Rigging and deck hardware are essential for safety and for handling a sailing boat. Winter is a good time to check their condition and plan any necessary maintenance.
Checking Standing and Running Rigging
Visually inspect accessible wires, terminals, shackles, pulleys and ropes. Look for signs of wear, corrosion, deformation or unusual friction.
Halyards and sheets can be rinsed with fresh water, provided their condition and the manufacturer’s recommendations allow it. They should then be dried before being stored, if necessary.
Any issue identified on a structural component or a heavily loaded part should be assessed by a qualified professional.
Maintaining Winches and Deck Hardware
Winches, pulleys, clutches and other deck hardware components must operate correctly to ensure smooth manoeuvres.
Depending on the model, maintenance may involve cleaning, inspecting moving parts and applying the lubricant recommended by the manufacturer.
Do not dismantle equipment without consulting its manual. Some mechanisms contain small components and require a specific procedure.
Winter is also the right time to identify worn or missing parts and arrange replacements before sailing resumes.
5. Maintaining Batteries and Electrical Equipment
Batteries and electrical systems can deteriorate when left unused for several months.
Before winterising your boat, check the general condition of the batteries, their charge levels, their connections and the battery terminals for visible corrosion. Also check that the charger is working correctly and follow the storage recommendations for your battery technology.
Depending on the boat’s installation and the manufacturer’s instructions, it may be necessary to disconnect certain batteries or maintain their charge using a suitable device.
Important: If an automatic bilge pump or another safety device needs to remain powered, do not disconnect its power supply without arranging a suitable alternative.
Use this opportunity to inspect accessible connections, cables and electrical equipment. Any faults should be dealt with before the boat returns to service.
6. Checking the Hull, Seacocks and Safety Equipment
Winterisation is also an opportunity to carry out a general inspection of the boat.
If the sailing boat is taken out of the water, use the opportunity to inspect the hull, antifouling, keel, rudder, propeller and anodes. Any necessary work can then be planned before the boat is relaunched.
If the boat remains afloat, pay particular attention to the following:
- The condition of mooring lines and fenders.
- The operation of the bilge pumps.
- Any signs of water ingress.
- The visible condition of through-hull fittings and connections.
- The proper operation of safety equipment that must remain functional.
Also check the expiry dates and condition of your safety equipment, including the liferaft, fire extinguishers and any equipment covered by the requirements applicable to your boat.
Inspections should be adapted to the type of sailing boat and its storage conditions. If you have any doubts about a seacock, through-hull fitting or structural component, consult a professional.
7. Planning Spare Parts and Repairs Before Spring
Winterisation is the ideal time to identify parts that need replacing and plan maintenance work. By anticipating these needs, you can avoid searching urgently for a specific part just before your next trip out to sea.
Make a list of components to inspect or replace, including deck hardware, rigging components, fittings, deck accessories, plumbing parts and components specific to your boat model.
To order the correct part, take the time to record all the available information: brand, model, dimensions, manufacturer’s reference and, if necessary, photographs of the existing part.
Not all boat parts are universal. Checking compatibility is essential before placing an order, particularly for mechanical components or safety-related equipment.
At Shop & Sail, we help boat owners find spare parts and marine equipment. If you cannot find the reference you need on our website, contact our team and tell us what you are looking for so we can help identify the right part.
Explore our products and solutions at Shop & Sail.
Checklist: Essential Checks Before Winterising a Sailing Boat
Before leaving your boat unused for the winter, use this checklist to make sure the main maintenance tasks have been covered.
- Choose the winter storage method: ashore or afloat.
- Service the engine according to the manufacturer’s recommendations.
- Prepare water systems and equipment that may be affected by frost.
- Rinse, dry and inspect the sails.
- Check the rigging, ropes and deck hardware.
- Inspect the batteries and electrical systems.
- Clean the interior and reduce the risk of moisture.
- Check the hull, seacocks and accessible equipment.
- Inspect mooring lines, fenders and bilge pumps if the boat remains afloat.
- Check the safety equipment.
- List any repairs and spare parts required.
- Plan regular inspections throughout the winter.
This checklist provides a general starting point. The work required will depend on the sailing boat model, its engine, its location and the manufacturers’ recommendations.
Conclusion : a well-prepared winter storage programme for peace of mind whilst sailing
Winterising your sailing boat properly means looking after it during the period when it is used the least. By checking the engine, sails, rigging, batteries and on-board equipment, you minimise the risk of damage and can prepare for the next season with greater peace of mind.
It is also the best time to plan ahead for repairs and identify the spare parts you will need.
Looking for a spare part or equipment to maintain your boat ? Browse Shop & Sail or contact our team to tell us what you need. We’ll help you find the right parts and equipment for your boat.
