Jet Ski Winterization and Winter Storage in Michigan

A personal watercraft in Michigan is off the water for about 7 months a year at Detroit, and the median first 32°F night arrives October 20 at Grand Rapids (NOAA 1991-2020). 43 jet ski & PWC storage facilities are listed in Michigan, 35 with indoor or climate-controlled space.

October 20median first freeze, Grand Rapids
7 mooff the water at Detroit
18.6°FGrand Rapids January low
43Michigan jet ski & PWC storage listings
Junefirst month on the water, Detroit

The personal watercraft year in Michigan, month by month

MonthDetroit high / lowpersonal watercraftGrand Rapids snowGrand Rapids high / lowpersonal watercraft
Jan32° / 19°off the water22.6 in31° / 19°off the water
Feb35° / 21°off the water17.2 in34° / 20°off the water
Mar46° / 29°off the water7.6 in45° / 27°off the water
Apr59° / 39°off the water2.0 in58° / 37°off the water
May70° / 50°wetsuit weather0.0 in70° / 49°wetsuit weather
Jun80° / 60°on the water0.0 in79° / 58°on the water
Jul84° / 64°on the water0.0 in83° / 63°on the water
Aug81° / 63°on the water0.0 in81° / 61°on the water
Sep74° / 56°wetsuit weather0.0 in74° / 53°wetsuit weather
Oct62° / 44°off the water0.3 in61° / 42°off the water
Nov49° / 34°off the water7.1 in47° / 33°off the water
Dec37° / 25°off the water20.8 in36° / 25°off the water

Jet Ski column rule: on the water from a 76°F high; wetsuit weather from 66°F; off the water below.

By that rule a personal watercraft at Detroit has 3 months on the water (June to August), 2 of wetsuit weather and 7 off the water. By that rule a personal watercraft at Grand Rapids has 3 months on the water (June to August), 2 of wetsuit weather and 7 off the water.

Michigan freeze risk for personal watercraft

Michigan is hard-freeze country: Grand Rapids logs about 133.1 nights at or below 32°F and 50.5 days that never thaw, enough to freeze any water left in the exhaust, cooling passages and pump housing.

Winterizing a personal watercraft before the Michigan freeze

  1. Flush the cooling system, then run antifreeze through the flush port.
  2. Blow trapped water out of the exhaust.
  3. Stabilize a nearly full tank and run the engine.
  4. Fog the engine if the manual calls for it; grease the pump.
  5. Pull the battery to a maintainer and prop the seat open.
  6. Book move-in before October 13.

Michigan jet ski & PWC storage for the winter (43 listed)

43 live listings in 18 cities; by listed type: 35 indoor, 13 covered, 35 outdoor and 2 wet-slip (types overlap). No Michigan jet ski & PWC storage listing publishes a rate on StowHelp.

FacilityCityListed storageListed amenitiesAlso listed for
Saint Marina Home DialysisSouthfieldindoor, outdoorBoat
Miller MarinaSt. Clair Shoresindoor, outdoor, coveredBoat
Johnny's Boat Propeller ServiceDetroitindoor, outdoorBoat
Fisher JohnErieindoor, outdoorBoat
Boaters Value StoreDetroitindoor, outdoorBoat
Parks & Recreation DepartmentSaint Clair Shoresindoor, outdoorBoat
Rose Harbor MarinaMonroeindoor, outdoorBoat
Specialized Boat CareDearbornindoor, outdoorBoat
Kensington Boat & RV Storage CenterBrightonindoor, outdoor, coveredBoat
Mobile Marine CareTraverse Cityindoor, outdoor, coveredBoat
Blair Self StorageTraverse Cityindoor, outdoor, coveredsecurity cameras, gated entryBoat
Anchor Bay MarinaChesterfieldindoor, outdoor, coveredsecurity cameras, gated entryBoat
Wyandotte Boat RampWyandotteindoor, outdoorBoat
Wyandotte Rec DepartmentWyandotteindoor, outdoorBoat
MEYR Yacht RestorationHollandindoor, outdoor, covered, wet slipBoat
Trout's Yacht BasinMonroeindoor, outdoorBoat
The Sand Bar - Toledo Beach MarinaLa Salleindoor, outdoorBoat
Boat Town MarinaHarrison Townshipindoor, outdoor, coveredsecurity cameras, gated entryBoat
Thar She Floats MarinaLa Salleindoor, outdoorBoat
Island Harbor MarinaSaint Clair Shoresindoor, outdoorBoat

Listed storage types by Michigan city

CityJet Ski & PWC Storage listingsIndoorClimate-controlledOutdoor
Detroit14606
Wyandotte4404
Harrison Township3303
Saint Clair Shores3303
Chesterfield2202
Erie2202
La Salle2202
Monroe2202
Traverse City2202
Ann Arbor1101

Michigan cities by listed jet ski & PWC storage (with indoor count)

Detroit (14 listed, 6 indoor)Wyandotte (4 listed, 4 indoor)Harrison Township (3 listed, 3 indoor)Saint Clair Shores (3 listed, 3 indoor)Chesterfield (2 listed, 2 indoor)Erie (2 listed, 2 indoor)La Salle (2 listed, 2 indoor)Monroe (2 listed, 2 indoor)Traverse City (2 listed, 2 indoor)Ann Arbor (1 listed, 1 indoor)Brighton (1 listed, 1 indoor)Dearborn (1 listed, 1 indoor)Holland (1 listed, 1 indoor)Macatawa (1 listed, 1 indoor)Roseville (1 listed, 1 indoor)Southfield (1 listed, 1 indoor)St. Clair Shores (1 listed, 1 indoor)Taylor (1 listed, 1 indoor)

Michigan personal watercraft winterization questions

When should I winterize a personal watercraft in Michigan?

NOAA's 1991-2020 median first 32°F night is October 27 at Detroit and October 20 at Grand Rapids; winterize by October 6, two weeks ahead of the earlier date. By our personal watercraft rule Detroit stays on the water through August and Grand Rapids through August, then 2 months of wetsuit weather follow at Detroit. 35 Michigan listings offer indoor or climate-controlled space.

How many months is a personal watercraft off the water in Michigan?

7 at Detroit (September to May) and 7 at Grand Rapids (September to May), plus 2 and 2 months of wetsuit weather. Those off the water months hold 77.6 of the 77.6 inches of snow Grand Rapids averages a year (100%), which is the load on a cover or carport roof. At Detroit a personal watercraft is on the water from June to August (3 months), against 3 at Grand Rapids.

Where are indoor jet ski & PWC storage options in Michigan?

Of 43 live Michigan listings, 35 list indoor space and 0 climate-controlled units, against 35 outdoor and 13 covered. By city: Detroit (14 listed, 6 indoor), Wyandotte (4 listed, 4 indoor), Harrison Township (3 listed, 3 indoor) and Saint Clair Shores (3 listed, 3 indoor). Most indoor listings: Detroit (6), Wyandotte (4) and Harrison Township (3). Ask whether indoor means heated; listings span 18 cities in all.

How much freezing weather does a stored personal watercraft face in Michigan?

At Grand Rapids, 4 months average a low at or below 32°F, all of them off the water months by our personal watercraft rule. Grand Rapids logs 133.1 nights at or below 32°F and 4.4 at or below 0°F a year; January, the coldest month, averages 18.6°F and is off the water for a personal watercraft.

When can a personal watercraft come out of storage in Michigan?

After the last frost. The median last 32°F night is April 20 at Detroit and April 29 at Grand Rapids; the last 28°F hard freeze comes around April 8 and April 16. Our rule makes June the first month on the water at Detroit and June at Grand Rapids. That month Detroit averages a 60.2°F low and a 79.7°F high. Reverse each winterization step first.

Which Michigan cities have the most jet ski & PWC storage for the winter?

Michigan jet ski & PWC storage listings span 18 cities, led by Detroit (14 listed), Wyandotte (4 listed), Harrison Township (3 listed), Saint Clair Shores (3 listed) and Chesterfield (2 listed). For outdoor winter parking, Detroit (6 outdoor) and Wyandotte (4 outdoor) lead. Statewide, 35 list outdoor, 13 covered and 35 indoor or climate-controlled spaces. Compare the cities nearest you before October 20.

More Michigan and personal watercraft storage pages

Jet Ski & PWC Storage hub Michigan jet ski & PWC storage BoatRVMotorcycleKayakATVCar Snowmobile summer off-season storage ConnecticutIllinoisIndianaNew York

Sources

NOAA NCEI Climate Normals 1991-2020 (USW00094847, USW00094860); NOAA AOML hurricane impacts 1851-2025; StowHelp listings 2026-10-07 (methodology).

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