Pool season · Texas
San Angelo Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
One bar, one year, one San Angelo 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.
San Angelo, TX — 194 swim days a yearEach dot on the bar is one week of San Angelo'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 1–March 22), solid teal is swim season, and hollow amber is the closing window ending November 3. The black marker is today — its position against the colors is the entire executive summary.
The San Angelo pool calendar
Opening — target March 8
Target March 8; the practical window runs March 1–March 22, and the 7-day mean crosses the 61°F threshold around March 22. Cold-water starts are the cheap ones.
Closing — deadline November 3
Hold the cover until November 1, then winterize by November 3, a week ahead of the November 10 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on San Angelo'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 47° | 49° | 56° | 64° | 71° | 80° | 84° | 85° | 81° | 72° | 61° | 51° |
Warmest water typically June–September (peaking near 85°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Rowlett's pool season and San Antonio's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Texas season index.
San Angelo pool season FAQ
When should I open my pool in San Angelo, TX?
Open by March 8 — the model places San Angelo's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The San Angelo opening guide has the 12-step sequence.
When should I close my pool in San Angelo?
Close by November 3: cool water keeps its winter chemistry, but freeze damage is the hard stop. The San Angelo closing guide sequences the work backward from that date.
How long is the swim season in San Angelo?
San Angelo averages 194 days a year with normal highs of 80°F or better — right on the statewide median. The Texas season index ranks all 68 covered cities by the same metric.
How warm does pool water get in San Angelo?
An unheated pool near San Angelo typically peaks around 85°F in high summer and bottoms out near 47°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 San Angelo hits the closing window
Data: NOAA 1991–2020 climate normals via San Angelo (5.5 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.