Pool season · Texas
League City Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
One bar, one year, one League City pool. The season bar below draws everything the model knows — opening window, prime season, closing window — against today's date, with the working details one click away on the opening and closing pages.
Each dot on the bar is one week of League City's typical year, colored by what the model says that week is for: gray weeks are off-season, hollow teal marks the opening window (February 6–February 27), solid teal is swim season, and hollow amber is the closing window ending December 2. The black marker is today — its position against the colors is the entire executive summary.
The League City pool calendar
Opening — target February 13
Target February 13; the practical window runs February 6–February 27, and the 7-day mean crosses the 61°F threshold around February 27. Cold-water starts are the cheap ones.
Closing — deadline December 2
The window opens November 22 once water leaves the algae zone; the model deadline is December 2, a week ahead of the December 14 freeze normal.
Estimated water temperature by month
This is League City'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 55° | 56° | 62° | 67° | 74° | 81° | 83° | 84° | 82° | 76° | 67° | 59° |
Warmest water typically June–September (peaking near 84°F); heaters and covers shift any month up.
Email me when League City hits the closing window
Data: NOAA 1991–2020 climate normals via Houston Nwso (1.9 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.