Pool season · Texas
Port Arthur Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
One bar, one year, one Port Arthur 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.
The bar compresses Port Arthur's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the February 12–March 5 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends November 28. Wherever the today marker sits, the nearest color change is your next appointment.
The Port Arthur pool calendar
Opening — target February 19
Target February 19; the practical window runs February 12–March 5, and the 7-day mean crosses the 61°F threshold around March 5. Cold-water starts are the cheap ones.
Closing — deadline November 28
The window opens November 18 once water leaves the algae zone; the model deadline is November 28, a week ahead of the December 7 freeze normal.
Estimated water temperature by month
This is Port Arthur'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 54° | 55° | 61° | 67° | 73° | 80° | 83° | 84° | 82° | 76° | 66° | 58° |
Warmest water typically June–September (peaking near 84°F); heaters and covers shift any month up.
Email me when Port Arthur hits the closing window
Data: NOAA 1991–2020 climate normals via Port Arthur SE Tx Airport (8.6 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.