Boat Winterization in Wisconsin
In Wisconsin, local boat deadlines run from Oct 9 to Oct 30, with a median around Oct 19 — 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.
Notable cities
- Wausau — earliest deadline in the state
- Kenosha — latest deadline in the state
- Eau Claire — near the state median
All Wisconsin cities
| City | Local deadline | Median first 28°F | ||
|---|---|---|---|---|
| Wausau | Oct 9 | Oct 16 | View → | Checklist |
| Appleton | Oct 11 | Oct 18 | View → | Checklist |
| Madison | Oct 13 | Oct 20 | View → | Checklist |
| Waukesha | Oct 16 | Oct 23 | View → | Checklist |
| Beloit | Oct 16 | Oct 23 | View → | Checklist |
| New Berlin | Oct 17 | Oct 24 | View → | Checklist |
| Greenfield | Oct 17 | Oct 24 | View → | Checklist |
| Green Bay | Oct 18 | Oct 25 | View → | Checklist |
| La Crosse | Oct 18 | Oct 25 | View → | Checklist |
| Brookfield | Oct 18 | Oct 25 | View → | Checklist |
| Eau Claire | Oct 19 | Oct 26 | View → | Checklist |
| Janesville | Oct 19 | Oct 26 | View → | Checklist |
| Wauwatosa | Oct 23 | Oct 30 | View → | Checklist |
| Oshkosh | Oct 24 | Oct 31 | View → | Checklist |
| Fond du Lac | Oct 24 | Oct 31 | View → | Checklist |
| Milwaukee | Oct 25 | Nov 1 | View → | Checklist |
| West Allis | Oct 25 | Nov 1 | View → | Checklist |
| Sheboygan | Oct 25 | Nov 1 | View → | Checklist |
| Racine | Oct 27 | Nov 3 | View → | Checklist |
| Kenosha | Oct 30 | Nov 6 | View → | Checklist |
Back to the national Boat Winterization guide, or see the methodology.
Data: NOAA NCEI 1991–2020 U.S. Climate Normals; live outlook by Open-Meteo. Last updated: July 11, 2026.