Boat Winterization in Maryland

In Maryland, local boat deadlines run from Oct 25 to Nov 28, with a median around Nov 12 — a spread of weeks that a single statewide date would miss. Find your city below; each links to local freeze odds, a live 10-day outlook, and a checklist.

Covered boat locked in ice beside a dock on a frozen lake — winterize the engine before the first hard freeze catches it in the water — Maryland deadlines city by city — Photo: Unsplash

Jump to a city

Notable cities

Bowie — earliest deadline in the state
Baltimore — latest deadline in the state
Rockville — near the state median

All Maryland cities

City	Local deadline	Median first 28°F
Bowie	Oct 25	Nov 1	View →	Checklist
Hagerstown	Nov 2	Nov 9	View →	Checklist
Gaithersburg	Nov 12	Nov 19	View →	Checklist
Rockville	Nov 12	Nov 19	View →	Checklist
Frederick	Nov 14	Nov 21	View →	Checklist
Annapolis	Nov 21	Nov 28	View →	Checklist
Baltimore	Nov 28	Dec 5	View →	Checklist

Local boat winterization deadlines for Maryland cities — built from each city’s own NOAA station, not one statewide date.

Boat Winterization in Maryland: related searches

Maryland homeowners search for: how to winterize a boat, winterize outboard motor, and "boat winterization near me" — every city page below answers those with local NOAA dates.

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Back to the national Boat Winterization guide, or see the methodology. You can also compare how the boat winterization window shifts in Maine and Massachusetts.

Data: NOAA NCEI 1991–2020 U.S. Climate Normals; live outlook by Open-Meteo. Last updated: July 25, 2026.