Pool season · Texas
Mansfield Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
Mansfield'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.
Mansfield, TX — 166 swim days a yearReading it takes ten seconds: 52 dots, one per week. Solid teal is Mansfield's swim season; the hollow teal run before it (March 3 to March 24) is when to open; the hollow amber run after is when to close, with November 12 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Mansfield pool calendar
Opening — target March 10
Open by March 10 — a two-week head start on the March 24 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline November 12
The window opens November 2 once water leaves the algae zone; the model deadline is November 12, a week ahead of the November 21 freeze normal.
Estimated water temperature by month
Monthly averages of the site's water model run on Mansfield'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 47° | 49° | 55° | 63° | 70° | 79° | 84° | 86° | 82° | 73° | 62° | 52° |
Warmest water typically June–September (peaking near 86°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Lubbock's pool season and McAllen's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Texas season index.
Mansfield pool season FAQ
When should I open my pool in Mansfield, TX?
The site model recommends opening by March 10 — about two weeks before Mansfield'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 Mansfield opening guide.
When should I close my pool in Mansfield?
Winterize by November 12. The model holds the deadline a week ahead of Mansfield's NOAA 50% first-freeze date, so the plumbing is protected before the first hard night. The full sequence is in the Mansfield closing guide.
How long is the swim season in Mansfield?
Mansfield averages 166 days a year with normal highs of 80°F or better — right on the statewide median. The Texas season index ranks all 68 covered cities by the same metric.
How warm does pool water get in Mansfield?
An unheated pool near Mansfield typically peaks around 86°F in high summer and bottoms out near 47°F in winter, spending roughly 4 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 Mansfield hits the closing window
Data: NOAA 1991–2020 climate normals via Arlington Municipal Airport (6.7 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.