Pool season · Tennessee
Murfreesboro Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
Murfreesboro'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.
Murfreesboro, TN — 131 swim days a yearReading it takes ten seconds: 52 dots, one per week. Solid teal is Murfreesboro's swim season; the hollow teal run before it (April 4 to April 25) is when to open; the hollow amber run after is when to close, with October 20 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Murfreesboro pool calendar
Opening — target April 11
Target April 11; the practical window runs April 4–April 25, and the 7-day mean crosses the 61°F threshold around April 25. Cold-water starts are the cheap ones.
Closing — deadline October 20
Hold the cover until October 13, then winterize by October 20, a week ahead of the October 27 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Murfreesboro'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 39° | 39° | 46° | 54° | 63° | 72° | 78° | 79° | 75° | 66° | 54° | 44° |
Warmest water typically July–August (peaking near 79°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Morristown's pool season and Nashville's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Tennessee season index.
Murfreesboro pool season FAQ
When should I open my pool in Murfreesboro, TN?
The site model recommends opening by April 11 — about two weeks before Murfreesboro's 7-day mean temperature crosses 61°F, while the water is still too cold for algae. The step-by-step sequence is in the Murfreesboro opening guide.
When should I close my pool in Murfreesboro?
Winterize by October 20. The model holds the deadline a week ahead of Murfreesboro's NOAA 50% first-freeze date, so the plumbing is protected before the first hard night. The full sequence is in the Murfreesboro closing guide.
How long is the swim season in Murfreesboro?
Murfreesboro 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 Murfreesboro?
An unheated pool near Murfreesboro typically peaks around 79°F in high summer and bottoms out near 38°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 Murfreesboro hits the closing window
Data: NOAA 1991–2020 climate normals via Murfreesboro 5 N (5.4 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.