Pool season · Texas
Galveston Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
Galveston'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.
Galveston, TX — 180 swim days a yearReading it takes ten seconds: 52 dots, one per week. Solid teal is Galveston's swim season; the hollow teal run before it (February 3 to February 24) is when to open; the hollow amber run after is when to close, with December 12 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Galveston pool calendar
Opening — target February 10
Target February 10; the practical window runs February 3–February 24, and the 7-day mean crosses the 61°F threshold around February 24. Cold-water starts are the cheap ones.
Closing — deadline December 12
Hold the cover until December 2, then winterize by December 12, a week ahead of the January 7 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on Galveston'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 57° | 57° | 62° | 69° | 75° | 82° | 85° | 86° | 84° | 79° | 70° | 62° |
Warmest water typically June–October (peaking near 86°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Frisco's pool season and Garland's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Texas season index.
Galveston pool season FAQ
When should I open my pool in Galveston, TX?
The site model recommends opening by February 10 — about two weeks before Galveston'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 Galveston opening guide.
When should I close my pool in Galveston?
Winterize by December 12. The model holds the deadline a week ahead of Galveston's NOAA 50% first-freeze date, so the plumbing is protected before the first hard night. The full sequence is in the Galveston closing guide.
How long is the swim season in Galveston?
Galveston averages 180 days a year with normal highs of 80°F or better — about 26 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 Galveston?
An unheated pool near Galveston typically peaks around 86°F in high summer and bottoms out near 56°F in winter, spending roughly 5 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 Galveston hits the closing window
Data: NOAA 1991–2020 climate normals via Galveston Scholes Field (2.6 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.