Pool season · Tennessee
Clarksville Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
This is the one-page view of Clarksville's pool year: both model windows, the estimated water-temperature curve, and today's live position on the season bar. The detailed checklists live on the opening and closing guides; this page is the calendar you check between them.
Clarksville, TN — 131 swim days a yearThe bar compresses Clarksville's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the March 31–April 21 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends October 23. Wherever the today marker sits, the nearest color change is your next appointment.
The Clarksville pool calendar
Opening — target April 7
Open by April 7 — a two-week head start on the April 21 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline October 23
Hold the cover until October 13, then winterize by October 23, a week ahead of the November 1 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on Clarksville'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° | 46° | 55° | 64° | 73° | 78° | 79° | 76° | 66° | 54° | 44° |
Warmest water typically July–August (peaking near 80°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Chattanooga's pool season and Cleveland's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Tennessee season index.
Clarksville pool season FAQ
When should I open my pool in Clarksville, TN?
Open by April 7 — the model places Clarksville's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Clarksville opening guide has the 12-step sequence.
When should I close my pool in Clarksville?
Close by October 23: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Clarksville closing guide sequences the work backward from that date.
How long is the swim season in Clarksville?
Clarksville 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 Clarksville?
An unheated pool near Clarksville typically peaks around 80°F in high summer and bottoms out near 37°F in winter, spending roughly 2 months 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 Clarksville hits the closing window
Data: NOAA 1991–2020 climate normals via Clarksville Wwtp (1.6 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.