Pool season · Tennessee
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.
Each dot on the bar is one week of Cleveland's typical year, colored by what the model says that week is for: gray weeks are off-season, hollow teal marks the opening window (March 31–April 21), solid teal is swim season, and hollow amber is the closing window ending October 23. The black marker is today — its position against the colors is the entire executive summary.
The Cleveland pool calendar
Opening — target April 7
Target April 7; the practical window runs March 31–April 21, and the 7-day mean crosses the 61°F threshold around April 21. Cold-water starts are the cheap ones.
Closing — deadline October 23
The window opens October 14 once water leaves the algae zone; the model deadline is October 23, a week ahead of the October 30 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 40° | 41° | 47° | 56° | 64° | 72° | 78° | 78° | 75° | 66° | 54° | 45° |
Warmest water typically July–August (peaking near 78°F); heaters and covers shift any month up.
Email me when Cleveland hits the closing window
Data: NOAA 1991–2020 climate normals via Cleveland Fltr Plt (5.2 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.