Pool season · Texas
Pasadena Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
One bar, one year, one Pasadena 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.
Pasadena, TX — 187 swim days a yearThe bar compresses Pasadena's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the February 5–February 26 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends December 3. Wherever the today marker sits, the nearest color change is your next appointment.
The Pasadena pool calendar
Opening — target February 12
Target February 12; the practical window runs February 5–February 26, and the 7-day mean crosses the 61°F threshold around February 26. Cold-water starts are the cheap ones.
Closing — deadline December 3
Hold the cover until November 23, then winterize by December 3, a week ahead of the December 28 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on Pasadena'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 55° | 57° | 62° | 68° | 74° | 81° | 84° | 85° | 83° | 77° | 68° | 60° |
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 Odessa's pool season and Pearland's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Texas season index.
Pasadena pool season FAQ
When should I open my pool in Pasadena, TX?
Open by February 12 — the model places Pasadena's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Pasadena opening guide has the 12-step sequence.
When should I close my pool in Pasadena?
Close by December 3: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Pasadena closing guide sequences the work backward from that date.
How long is the swim season in Pasadena?
Pasadena averages 187 days a year with normal highs of 80°F or better — about 24 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 Pasadena?
An unheated pool near Pasadena typically peaks around 85°F in high summer and bottoms out near 55°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 Pasadena hits the closing window
Data: NOAA 1991–2020 climate normals via Houston Hobby Airport (8.0 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.