Pool season · Texas
Baytown Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
Baytown'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.
Baytown, TX — 176 swim days a yearThe bar compresses Baytown's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the February 18–March 11 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends November 24. Wherever the today marker sits, the nearest color change is your next appointment.
The Baytown pool calendar
Opening — target February 25
Target February 25; the practical window runs February 18–March 11, and the 7-day mean crosses the 61°F threshold around March 11. 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 4 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Baytown'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 52° | 54° | 59° | 65° | 72° | 79° | 82° | 84° | 81° | 75° | 65° | 57° |
Warmest water typically June–September (peaking near 84°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Austin's pool season and Beaumont's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Texas season index.
Baytown pool season FAQ
When should I open my pool in Baytown, TX?
The site model recommends opening by February 25 — about two weeks before Baytown'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 Baytown opening guide.
When should I close my pool in Baytown?
Winterize by November 24. The model holds the deadline a week ahead of Baytown's NOAA 50% first-freeze date, so the plumbing is protected before the first hard night. The full sequence is in the Baytown closing guide.
How long is the swim season in Baytown?
Baytown averages 176 days a year with normal highs of 80°F or better — about 11 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 Baytown?
An unheated pool near Baytown typically peaks around 84°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 Baytown hits the closing window
Data: NOAA 1991–2020 climate normals via Baytown (10.8 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.