Pool season · Wisconsin
Racine Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
Racine's whole pool calendar, condensed: when the water warms, when it cools, and where today falls between those edges. Use the opening guide and closing guide for the step-by-step work; keep this page for the dates.
Racine, WI — 0 swim days a yearReading it takes ten seconds: 52 dots, one per week. Solid teal is Racine's swim season; the hollow teal run before it (May 17 to June 7) is when to open; the hollow amber run after is when to close, with October 1 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Racine pool calendar
Opening — target May 24
Open by May 24 — a two-week head start on the June 7 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline October 1
The window opens September 21 once water leaves the algae zone; the model deadline is October 1, a week ahead of the October 24 freeze normal.
Estimated water temperature by month
This is Racine's typical-year water curve: the same EWMA model as the live widget, run on the 1991–2020 normals instead of this week's weather.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 24° | 23° | 30° | 39° | 49° | 59° | 69° | 71° | 67° | 57° | 45° | 33° |
The curve peaks near 71°F — comfortable-water months here usually involve a heater or a solar cover.
Every station tells its own story: compare this curve with Oshkosh's pool season and Sheboygan's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Wisconsin season index.
Racine pool season FAQ
When should I open my pool in Racine, WI?
Target May 24. That date backs off two weeks from the day Racine's 7-day mean temperature reaches 61°F, so you start up in cold, algae-resistant water. Work the full checklist in the Racine opening guide.
When should I close my pool in Racine?
The closing deadline is October 1 — late enough that the water has cooled out of the algae zone, early enough to beat Racine's first-freeze normal by about a week. See the Racine closing guide for the winterizing steps.
How long is the swim season in Racine?
Racine averages 0 days a year with normal highs of 80°F or better — about 11 days later than the Wisconsin median. The Wisconsin season index ranks all 11 covered cities by the same metric.
How warm does pool water get in Racine?
An unheated pool near Racine typically peaks around 71°F in high summer and bottoms out near 22°F in winter, never quite reaching the 78°F comfort line without a heater or solar cover. The month-by-month curve above shows the whole cycle; the methodology page explains the ±5°F error bars.
Email me when Racine hits the closing window
Data: NOAA 1991–2020 climate normals via Racine (2.2 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.