Pool season · Texas
Denton Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
This is the one-page view of Denton'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.
Denton, TX — 158 swim days a yearThe bar compresses Denton's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the March 12–April 2 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends November 9. Wherever the today marker sits, the nearest color change is your next appointment.
The Denton pool calendar
Opening — target March 19
Open by March 19 — a two-week head start on the April 2 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline November 9
The window opens October 30 once water leaves the algae zone; the model deadline is November 9, a week ahead of the November 20 freeze normal.
Estimated water temperature by month
Monthly averages of the site's water model run on Denton'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 45° | 46° | 52° | 61° | 69° | 78° | 84° | 86° | 82° | 72° | 60° | 50° |
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 Dallas's pool season and Edinburg's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Texas season index.
Denton pool season FAQ
When should I open my pool in Denton, TX?
Open by March 19 — the model places Denton's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Denton opening guide has the 12-step sequence.
When should I close my pool in Denton?
Close by November 9: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Denton closing guide sequences the work backward from that date.
How long is the swim season in Denton?
Denton averages 158 days a year with normal highs of 80°F or better — about 11 days later than the Texas median. The Texas season index ranks all 68 covered cities by the same metric.
How warm does pool water get in Denton?
An unheated pool near Denton typically peaks around 86°F in high summer and bottoms out near 45°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 Denton hits the closing window
Data: NOAA 1991–2020 climate normals via Denton 2 SE (2.5 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.