Pool season · Ohio
Cleveland Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
Cleveland'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.
Reading it takes ten seconds: 52 dots, one per week. Solid teal is Cleveland's swim season; the hollow teal run before it (April 27 to May 18) is when to open; the hollow amber run after is when to close, with October 12 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Cleveland pool calendar
Opening — target May 4
Target May 4; the practical window runs April 27–May 18, and the 7-day mean crosses the 61°F threshold around May 18. Cold-water starts are the cheap ones.
Closing — deadline October 12
The window opens October 2 once water leaves the algae zone; the model deadline is October 12, a week ahead of the November 12 freeze normal.
Estimated water temperature by month
This is Cleveland'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 31° | 30° | 34° | 44° | 56° | 66° | 73° | 74° | 70° | 61° | 50° | 39° |
The curve peaks near 74°F — comfortable-water months here usually involve a heater or a solar cover.
Email me when Cleveland hits the closing window
Data: NOAA 1991–2020 climate normals via Cleveland Burke Airport (2.9 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.