Pool season · Texas
Austin Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
Austin's whole pool calendar, condensed: when the water warms, when it cools, and where today falls between those edges. Use the opening guide and closing guide for the step-by-step work; keep this page for the dates.
Austin, TX — 193 swim days a yearReading it takes ten seconds: 52 dots, one per week. Solid teal is Austin's swim season; the hollow teal run before it (February 16 to March 9) is when to open; the hollow amber run after is when to close, with November 24 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Austin pool calendar
Opening — target February 23
Target February 23; the practical window runs February 16–March 9, and the 7-day mean crosses the 61°F threshold around March 9. Cold-water starts are the cheap ones.
Closing — deadline November 24
Hold the cover until November 14, then winterize by November 24, a week ahead of the December 3 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on Austin'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 52° | 54° | 60° | 67° | 73° | 81° | 85° | 87° | 84° | 76° | 66° | 57° |
Warmest water typically June–September (peaking near 87°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Atascocita's pool season and Baytown's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Texas season index.
Austin pool season FAQ
When should I open my pool in Austin, TX?
The site model recommends opening by February 23 — about two weeks before Austin's 7-day mean temperature crosses 61°F, while the water is still too cold for algae. The step-by-step sequence is in the Austin opening guide.
When should I close my pool in Austin?
Winterize by November 24. The model holds the deadline a week ahead of Austin's NOAA 50% first-freeze date, so the plumbing is protected before the first hard night. The full sequence is in the Austin closing guide.
How long is the swim season in Austin?
Austin averages 193 days a year with normal highs of 80°F or better — about 13 days earlier than the Texas median. The Texas season index ranks all 68 covered cities by the same metric.
How warm does pool water get in Austin?
An unheated pool near Austin typically peaks around 87°F in high summer and bottoms out near 52°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 Austin hits the closing window
Data: NOAA 1991–2020 climate normals via Austin-camp Mabry (1.5 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.