Pool closing · State guide
When to Close Your Pool in Tennessee
Last updated: July 15, 2026 · 14 cities covered
Closing deadlines across Tennessee stretch about 19 days: Johnson City needs the cover on first (October 15), Memphis last (November 3), and the statewide median deadline is October 22.
Each deadline is the model's two-clock compromise — ten days after the water leaves the algae zone, capped a week before the local 50% first-freeze date. City pages carry the live widget that flags early-freeze years and the full winterizing sequence.
| City | Window opens | Close by | First freeze (50%) |
|---|---|---|---|
| Bristol | Oct 6 | Oct 16 | Oct 24 |
| Chattanooga | Oct 20 | Oct 30 | Nov 9 |
| Clarksville | Oct 13 | Oct 23 | Nov 1 |
| Cleveland | Oct 14 | Oct 23 | Oct 30 |
| Franklin | Oct 14 | Oct 24 | Oct 31 |
| Jackson | Oct 15 | Oct 22 | Oct 29 |
| Johnson City | Oct 5 | Oct 15 | Oct 24 |
| Kingsport | Oct 9 | Oct 19 | Oct 29 |
| Knoxville | Oct 11 | Oct 21 | Oct 28 |
| Memphis | Oct 24 | Nov 3 | Nov 16 |
| Morristown | Oct 9 | Oct 19 | Oct 28 |
| Murfreesboro | Oct 13 | Oct 20 | Oct 27 |
| Nashville | Oct 13 | Oct 23 | Oct 31 |
| Spring Hill | Oct 15 | Oct 25 | Nov 1 |
Dates are typical-year model outputs, not forecasts — each city guide carries the live widget that tracks the current year against them.
How to use these dates
Each "close by" deadline is the model's two-clock compromise for that city: ten days after its 7-day mean temperature falls back through 61°F (water goes algae-dormant soon after), but never later than a week before its 50% first-freeze date from the NOAA 1991–2020 normals. Closing inside the window seals cold, stable water under the cover; closing early seals a warm algae incubator instead.
Treat the dates as typical-year guidance, not forecasts. An early cold snap moves the real deadline — each city guide runs a live water-temperature widget that flags a 32°F night inside the 10-day forecast as urgent, and carries the full winterizing checklist in working order.