FrostList

When to Winterize Your Boat in Wilson, NC

ON TRACK138 days until first 28°F freezeNov 26

The first 28°F freeze near Wilson averages November 26 (1991–2020 normals) — enough to crack an unprotected block even where owners assume they're safe — so winterize the boat by November 19. Plan for the early end: the one-in-ten date lands about 17 days before the median.

OUTLOOK

Typical first first 28°F freeze near Nov 26; local deadline about Nov 19. The live 10-day outlook loads here.

Local freeze dates for Wilson

ThresholdEarly (1-in-10)MedianLate (9-in-10)
32°F (light freeze)Nov 1Nov 12Dec 1
28°F (hard freeze)Nov 9Nov 26Dec 20
24°F (severe)Nov 20Dec 15Jan 13

NOAA station: Wilson 3 Sw · 2.6 mi away · 110 ft elevation.

The reference station for Wilson is Wilson 3 Sw (2.6 mi, 110 ft). First freeze there: 32°F by Nov 12, 28°F by Nov 26, 24°F by Dec 15. The 28°F freeze has come as early as Nov 9 and as late as Dec 20, a 41-day spread. Spring's last 32°F freeze clears around Mar 22. Snowfall averages 2 inches a year.

Expect the first frost near Nov 12 in Wilson and the first hard freeze by about Nov 26. That first freezing night has ranged from Nov 1 to Dec 1, roughly a 30-day spread. On the spring side, the last 32°F freeze clears around Mar 22 and as late as Apr 8 — the green light for reopening water and de-winterizing. With almost no snow in a normal year, cold — not plowing — sets the calendar, and it centers on Mar 22.

Your boat checklist

  1. Change the engine oil and filter while the motor is warm so contaminants leave with the old oil.
  2. Run the engine on antifreeze until pink fluid reaches the outlet, protecting the block and manifolds.
    Helpful gear: Marine antifreeze — Recommended pick
  3. Fog the cylinders with fogging oil as the engine runs down to coat internal parts against corrosion.
    Helpful gear: Fogging oil — Recommended pick
  4. Top off the fuel tank and add stabilizer to limit condensation and protect ethanol-blend fuel.
    Helpful gear: Marine fuel stabilizer — Recommended pick
  5. Drain the raw-water system, the livewell, and any washdown lines that can trap water.
  6. Remove the battery, charge it fully, and keep it on a maintainer over the layup.
    Helpful gear: Battery maintainer — Recommended pick
  7. Support the cover so snow and rain shed off, and leave vents so the interior can breathe.
  8. For an inboard or sterndrive, follow the manual closely — those blocks are the ones freeze claims hit hardest.

What to have on hand

Marine antifreeze
Propylene-glycol fluid rated for engine blocks and systems.
Recommended pick
Marine fuel stabilizer
Additive that protects ethanol-blend fuel over the layup.
Recommended pick
Fogging oil
Spray that coats cylinders against corrosion in storage.
Recommended pick
Battery maintainer
Keeps the cranking battery topped off on the trailer.
Recommended pick

What this means locally

Against its neighbors, Wilson (first freeze Nov 26) runs later than Rocky Mount (Nov 17) and later than Greenville (Nov 22). Across North Carolina, local prep deadlines in our data range from Nov 3 to Nov 26, so a statewide rule of thumb would miss Wilson by weeks. In Wilson, that same cold is your cue to winterize an RV and store a motorcycle.

Other winter jobs in Wilson

Every task below is dated to Wilson's own freeze and snow normals.

Sprinklers → Nov 16Frozen pipes → Nov 1Car battery → Nov 26Sump pump → Mar 22RV → Nov 16Motorcycle → Nov 12

See the full Wilson winter checklist, in order →

Frequently asked questions

At what temperature does a boat engine block crack?
Trapped water in an engine block or manifold can freeze and crack the casting once temperatures fall below 32°F and stay there long enough. Inboard and sterndrive blocks hold the most water and are the most vulnerable. Draining fully and adding antifreeze before the first hard freeze near Nov 26 is the protection.
Do outboards need winterizing?
Yes. An outboard should be drained so no water sits in the powerhead or lower unit, and the fuel system stabilized. Outboards self-drain better than inboards when tilted down, but fogging the cylinders and changing the gear oil are still part of a proper layup.
Fogging oil: is it necessary?
Fogging coats the cylinder walls and internal parts with a film that resists corrosion during months of storage. On engines that sit all winter it is cheap insurance against rust, especially in humid or coastal storage. Follow your engine maker's guidance on how to apply it.
How much does boat winterization cost?
A professional winterization varies with engine type and boat size, and inboards cost more than a simple outboard. Doing it yourself costs mainly antifreeze, oil, and fogging oil. Either way, the bill is far smaller than repairing a cracked block, which is the failure winterizing prevents.
Do boats in NC really need winterizing?
If temperatures reach freezing where the boat is stored, yes. Freeze claims are common in milder states precisely because owners assume they are safe and skip the step, then a rare cold snap cracks a block. Check the local freeze dates above and protect the engine before the first hard freeze.
When should I de-winterize my boat?
De-winterize in spring once the risk of a hard freeze has passed for your area. Reconnect and charge the battery, replace drain plugs, check hoses and clamps, and inspect the fuel system before the first launch. Reopening too early leaves the block exposed to a late cold snap.

Data: NOAA 1991–2020 normals via Wilson 3 Sw, live outlook by Open-Meteo. Sources · Methodology. Last updated: July 11, 2026.