Winterizing for yachts: how to prepare for the season

Nov 10, 2021 | Superyachts

Properly winterizing and storing your boat will help prevent damage and make sure you are ready for on-the-water fun in the spring. Consult your manufacturer’s manuals and service guides for specific winterizing, flushing and maintenance instructions before you begin. Plan ahead, create a checklist (see below) and gather all the items you will need to winterize and store your boat.


Below Deck

  • Clean and dry bilges, and verify pump operates properly.
  • Pump out the holding tank and add propylene glycol antifreeze to the head.
  • Drain all systems that use water (e.g. freshwater system, shower sump) and replace with propylene glycol antifreeze as appropriate.
  • Remove all food and beverages and clean food particles that may tempt winter critters.
  • Secure all ports and hatches.

Store in the Water

  • Close all seacocks except for cockpit drains and plug exhaust ports.
  • Check dock lines, chafe guards and fenders for proper placement, and tie off tiller or steering wheel.


  • Custom-made canvas or synthetic covers• Best at protecting your boat from the elements and is reusable.
    • Allows for air circulation – prevents mildew.
  • Shrinkwrap
    • Effective at keeping rain and snow out, but susceptible to moisture buildup.
    • Professionals should shrinkwrap your boat, as it’s easy to damage your boat and/or ignite the shrinkwrap.
    • If using a different covering, make sure that it’s water/snowproof, and there’s airflow.


  • Fill fuel tanks, add stabilizer, and change fuel filters and separators.
  • Change oil and filter.
    • Check coolant level in the freshwater-cooling system and add coolant as necessary.
    • Run antifreeze through the raw-water-cooling system. Use propylene glycol antifreeze

(orange-pink colour) as it’s non-toxic.
• Dispose of and/or recycle waste oils, engine coolants and hazardous materials properly.


  • Fill fuel tanks and add stabilizer.
    • Drain the gear case and add eco-friendly lubricant.• Flush engine using an “ear-muffs” device.


  • If you take your batteries home, store them in a cool, dry place such as your basement and put them on a trickle marine charger.
  • If you leave your batteries onboard, make sure battery cable connections are tight and free of corrosion and hook batteries up to a marine charger, or leave them unplugged and charge them completely at least once a month.

    Did you know?
    Analyzing over ten years of freeze claims, Boat U.S. Marine Insurance found that more than 3/4 of the claims involved cracks in the engine block or the exhaust manifolds that occurred because water remained in the engine or cooling system during a hard freeze.

    Source: Green Boating Guideline,


Browse the most interesting updates in the market of luxury yachts eco toiletries. Subscribe to our Newsletter for more info!

@thespastew recommends us!

@thespastew recommends us!

    @thespastew is a luxury yacht spa hostess who travels the world on super yachts and has had the pleasure of testing our products and has recommended us!     Do not miss what she says in his post:   Ahoy, yachties! ⚓️ If you're in the market for a luxurious...

Conflicts on board: how to avoid 👐

Conflicts on board: how to avoid 👐

Conflicts during coexistence and within the yacht among the crew are related to the fact of living together.They don't usually happen often but sometimes there are inevitably friction between yacht hostesses. Today we are going to explain some tips to avoid these...


MH Boutique Chat

× How can I help you?