Pool season · Texas
Flower Mound Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
This is the one-page view of Flower Mound'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.
Each dot on the bar is one week of Flower Mound's typical year, colored by what the model says that week is for: gray weeks are off-season, hollow teal marks the opening window (March 11–April 1), solid teal is swim season, and hollow amber is the closing window ending November 9. The black marker is today — its position against the colors is the entire executive summary.
The Flower Mound pool calendar
Opening — target March 18
Open by March 18 — a two-week head start on the April 1 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline November 9
Hold the cover until October 30, then winterize by November 9, a week ahead of the November 17 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Flower Mound'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 45° | 47° | 53° | 61° | 68° | 78° | 83° | 86° | 81° | 72° | 60° | 51° |
Warmest water typically June–September (peaking near 86°F); heaters and covers shift any month up.
Email me when Flower Mound hits the closing window
Data: NOAA 1991–2020 climate normals via Grapevine Dam (6.7 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.