Pool season · Tennessee
Cleveland Pool Season: the Year on One Bar
Last updated: July 25, 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.
Cleveland, TN — 131 swim days a yearEach 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.
Every station tells its own story: compare this curve with Clarksville's pool season and Franklin's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Tennessee season index.
Cleveland pool season FAQ
When should I open my pool in Cleveland, TN?
Target April 7. That date backs off two weeks from the day Cleveland's 7-day mean temperature reaches 61°F, so you start up in cold, algae-resistant water. Work the full checklist in the Cleveland opening guide.
When should I close my pool in Cleveland?
The closing deadline is October 23 — late enough that the water has cooled out of the algae zone, early enough to beat Cleveland's first-freeze normal by about a week. See the Cleveland closing guide for the winterizing steps.
How long is the swim season in Cleveland?
Cleveland averages 131 days a year with normal highs of 80°F or better — right on the statewide median. The Tennessee season index ranks all 14 covered cities by the same metric.
How warm does pool water get in Cleveland?
An unheated pool near Cleveland typically peaks around 78°F in high summer and bottoms out near 40°F in winter, spending roughly 1 month at or above the 78°F comfort line most swimmers prefer. The month-by-month curve above shows the whole cycle; the methodology page explains the ±5°F error bars.
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.