1. Pick the haul-out day by the forecast, not the calendar
Fall weather is different from summer weather. For the Nantucket Sound area, the Coast Pilot says that from October through March, gales can be expected about 3 to 6 percent of the time, frequently from the west and northwest. On October 16, 2026, NWS Boston had a Small Craft Advisory up for Buzzards Bay, Vineyard Sound, and Nantucket Sound for northwest winds of 15 to 25 knots with gusts to 30 and seas of 3 to 5 feet. That is not the day to run a boat to the yard or back it onto a trailer at a busy ramp.
- Book the yard slot early, then confirm the run a day or two ahead.
- Check the marine zone forecast for the whole route, for example Buzzards Bay, Nantucket Sound, or Cape Cod Bay.
- Time the current if you are going through a canal or passage. The Coast Pilot canal notes put the Cape Cod Canal at about 4.0 knots on the flood and 4.5 knots on the ebb under ordinary conditions.
Boat or Nope works the same in October as it does in July. Marine warnings drive the call, gusts are checked against your limit (default: your wind limit plus 5 knots), and it gives a one-line reason. The warnings cheat sheet is the headline list, and how much wind is too much is how to set the limits you will use on the way to the yard.
2. Before you haul
Pump out the holding tank. Massachusetts CZM says sewage holding tanks should be emptied before winter storage, and it keeps a list of coastal pumpout facilities if the marina does not have one.
Clean the bilge. The state recommends emptying the bilge for winter so there is less chance of a spill and the bilge pump is not damaged by ice. Oily bilge water counts as hazardous waste, so put an oil-absorbent pad or bilge sock in first to pick up the oil before the water is pumped out.
Remove electronics, cushions, life jackets, and anything that holds moisture. A practical habit, not a state rule: while that gear is coming off the boat, check the expiration dates printed on flares and other safety gear and follow those labels.
3. Fuel system
- Follow your engine manufacturer's recommendation. Massachusetts CZM says this explicitly, and points out that E10 gasoline (10 percent ethanol) can cause problems over the winter. Ethanol absorbs water, can gum up fuel lines, and can damage fiberglass tanks.
- Add a fuel stabilizer for gasoline or diesel. The Clean Marina Guide says stabilizers prevent fuel breakdown, corrosion, sludge, and varnish.
- Tank level: the Clean Marina Guide suggests filling to about 80 to 90 percent to reduce fumes and condensation. The boater fact sheets say never fill completely, because gasoline expands as it warms.
- Run the engine long enough to get stabilized fuel through the system, if your manual calls for it.
4. Engine and oil
Change the oil and filter the way your manual says. Massachusetts CZM reminds boaters that retailers are required to accept used oil from customers, and that it should never go in the trash, on the ground, or down a drain. Keep absorbent pads handy for drips.
A practical tip, not official guidance: many owners change the oil in the fall so used oil is not left sitting in the engine until spring. Whether that timing is right for your engine is a manual question, not a Massachusetts rule.
Another practical tip: if the manual calls for a lower-unit or outdrive gear-oil change, a common habit is to look at the old oil for a milky look, which often means water got in. Confirm what to do with the manual or a mechanic. That check is not in the state winterizing guidance.
5. Cooling and fresh-water systems
This step is what protects you from a cracked block in March.
- Drain each system as much as possible. That means the raw-water cooling, fresh-water tanks and lines, water heater, washdown, and head.
- Fill with non-toxic propylene glycol antifreeze, usually orange or pink. Massachusetts CZM says never use automotive ethylene glycol (blue-green). It is toxic to marine life and can cause serious illness if it ends up in a drinking-water system.
- Some yards blow lines clear with compressed air and use antifreeze only in traps that cannot be fully drained, as the Clean Marina Guide notes.
6. Hull, cleaning, and cover
Wash water from hull cleaning can carry bottom paint and other pollutants. Make sure the marina handles the runoff properly. If you do it yourself, lay a tarp under the boat and stay away from storm drains. Use an environmentally friendly cleaner, or just water and elbow grease.
The Clean Marina Guide recommends canvas covers or recyclable shrink wrap. On the Cape, WHOI Sea Grant runs a shrink-wrap recycling program with Cape Cod Cooperative Extension and town transfer stations. The wrap has to be clean and dry, with straps, rope, wood, zippers, and vents removed. Fees and eligibility vary by station.
7. Before you walk away
These last items are general practical habits. They are not Massachusetts CZM steps and they are not NOAA guidance. Follow the manufacturer where one exists.
- Batteries: disconnect or maintain them the way the battery and boat manufacturer recommend. The exact steps belong to that manual.
- Ventilation: a common habit is to crack lockers and hatches inside the cover so air can move. How far to open them depends on the cover and the boat.
- Write down anything that broke or needs work. That list becomes the spring commissioning list.
- Photograph the engine area and the winterization stickers or receipts so spring-you is not guessing.
The quick checklist
- Book the yard slot, then pick a calm haul-out day by the marine forecast.
- Pump out the holding tank.
- Clean the bilge with an absorbent pad, and empty it.
- Remove gear, electronics, and soft goods. Checking flare dates is a practical extra, not a state step.
- Fuel: stabilizer, and a tank level per the manufacturer. State guidance suggests about 80 to 90 percent, never full.
- Oil and filter if the manual says so. Recycle all used oil. A gear-oil look is a practical check only.
- Drain cooling and fresh-water systems. Fill with propylene glycol antifreeze, never ethylene glycol.
- Wash the hull where runoff is managed, or over a tarp.
- Canvas cover or recyclable shrink wrap.
- Batteries and ventilation, following the manufacturer, plus notes for spring.
I am spending this winter on Boat or Nope. The updates page has what is changing. When it is time to launch, the same Go, Caution, or No-Go call will be there for the first trip. The app keeps your boat's limits saved.