Texas Pool Season: Opening & Closing Dates by City

Local dates for every featured Texas city — when the water warms up, when it cools off, and how long the season actually lasts.

City Opening window Closing window Season
Dallas Mar 25 – Apr 18 Oct 18 – Nov 4 ≈ 203 days
Houston Mar 8 – Apr 5 Oct 29 – Nov 17 ≈ 230 days
Austin Mar 23 – Apr 19 Oct 17 – Nov 4 ≈ 203 days
San Antonio Mar 14 – Apr 12 Oct 23 – Nov 10 ≈ 218 days
El Paso Mar 28 – Apr 20 Oct 12 – Oct 27 ≈ 194 days
Lubbock Apr 16 – May 7 Sep 29 – Oct 17 ≈ 165 days

Windows show the stretch when each city's daily average passes through the low-to-mid 60s°F (1991–2020 NOAA records, nearest station to each city). Click a city for its month-by-month table and full season notes.

Season geography

Across Texas's featured cities, typical openings spread from Mar 22 to Apr 26, closings from Oct 8 to Nov 7, and the unheated season runs 165–230 days depending on where you are. Elevation, coastal water, and urban heat all pull real dates around, which is exactly why a state-level answer isn't enough.

For your exact town, the pool season lookup takes a ZIP code. Opening day itself is a chemistry job — the dosing calculator turns your first test reading of the year into exact amounts.

Texas planning pages

When to open — Texas When to close — Texas All states →