FrostList

When to Winterize Your Boat in Savannah, GA

ON TRACK164 days until first 28°F freezeDec 22

Plan to haul out and winterize your boat in Savannah by December 15. The first 28°F freeze near Savannah averages December 22 in the 1991–2020 normals, and freeze damage often surprises owners in milder states. Year to year the date swings about 54 days, which is why the live outlook beats the calendar.

OUTLOOK

Typical first first 28°F freeze near Dec 22; local deadline about Dec 15. The live 10-day outlook loads here.

Local freeze dates for Savannah

ThresholdEarly (1-in-10)MedianLate (9-in-10)
32°F (light freeze)Nov 11Nov 30Dec 28
28°F (hard freeze)Nov 24Dec 22Jan 17
24°F (severe)Dec 7Jan 4Feb 4

NOAA station: Savannah Intl AP · 7.2 mi away · 46 ft elevation.

Savannah draws its numbers from Savannah Intl AP, 46 feet up and 7.2 miles away. Its median first-freeze dates are 32°F by Nov 30, 28°F by Dec 22, 24°F by Jan 4. Year to year the 28°F date has ranged from Nov 24 to Jan 17 — about 54 days apart. Spring's last 32°F freeze clears around Mar 2.

In Savannah, freezing nights (32°F) typically begin around Nov 30 and the first hard freeze (28°F) follows near Dec 22. Year to year, the first 32°F night has fallen anywhere from Nov 11 to Dec 28 — about 47 days apart. Spring's final freeze lands near Mar 2 and as late as Mar 25, so that is when outdoor water and stored gear can safely come back online. Measurable snow is rare, so the freeze near Mar 2 — not snow load — drives the local prep list.

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

Savannah freezes about a week ahead of Hilton Head Island (Dec 28) and later than Charleston (Jan 8) — a reminder that even nearby towns differ by days. Statewide, Georgia prep dates run Nov 12 through Dec 19, which is why Savannah gets its own number rather than a Georgia-wide average. The same freeze also decides when to winterize an RV and store a motorcycle.

Other winter jobs in Savannah

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

Sprinklers → Dec 12Frozen pipes → Nov 11Car battery → Dec 22Sump pump → Mar 2RV → Dec 12Motorcycle → Nov 30

See the full Savannah 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 Dec 22 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 GA 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 Savannah Intl AP, live outlook by Open-Meteo. Sources · Methodology. Last updated: July 11, 2026.