Pool season · Tennessee
Knoxville Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
One bar, one year, one Knoxville pool. The season bar below draws everything the model knows — opening window, prime season, closing window — against today's date, with the working details one click away on the opening and closing pages.
Reading it takes ten seconds: 52 dots, one per week. Solid teal is Knoxville's swim season; the hollow teal run before it (April 7 to April 28) is when to open; the hollow amber run after is when to close, with October 21 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Knoxville pool calendar
Opening — target April 14
Target April 14; the practical window runs April 7–April 28, and the 7-day mean crosses the 61°F threshold around April 28. Cold-water starts are the cheap ones.
Closing — deadline October 21
Hold the cover until October 11, then winterize by October 21, a week ahead of the October 28 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on Knoxville's own normals — the shape of a typical year, not a forecast. The widget above shows where the current year actually sits.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 38° | 38° | 45° | 53° | 62° | 71° | 76° | 77° | 74° | 65° | 53° | 44° |
The curve peaks near 77°F — comfortable-water months here usually involve a heater or a solar cover.
Email me when Knoxville hits the closing window
Data: NOAA 1991–2020 climate normals via Knoxville Experiment Station (4.9 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.