Pool season · Texas
Amarillo Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
Amarillo'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.
Amarillo, TX — 133 swim days a yearReading it takes ten seconds: 52 dots, one per week. Solid teal is Amarillo's swim season; the hollow teal run before it (April 17 to May 8) is when to open; the hollow amber run after is when to close, with October 18 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Amarillo pool calendar
Opening — target April 24
Target April 24; the practical window runs April 17–May 8, and the 7-day mean crosses the 61°F threshold around May 8. Cold-water starts are the cheap ones.
Closing — deadline October 18
The window opens October 8 once water leaves the algae zone; the model deadline is October 18, a week ahead of the October 29 freeze normal.
Estimated water temperature by month
Monthly averages of the site's water model run on Amarillo'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 35° | 38° | 43° | 52° | 60° | 71° | 77° | 78° | 74° | 64° | 51° | 41° |
Warmest water typically August–August (peaking near 79°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Allen's pool season and Arlington's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Texas season index.
Amarillo pool season FAQ
When should I open my pool in Amarillo, TX?
Open by April 24 — the model places Amarillo's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Amarillo opening guide has the 12-step sequence.
When should I close my pool in Amarillo?
Close by October 18: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Amarillo closing guide sequences the work backward from that date.
How long is the swim season in Amarillo?
Amarillo averages 133 days a year with normal highs of 80°F or better — about 47 days later than the Texas median. The Texas season index ranks all 68 covered cities by the same metric.
How warm does pool water get in Amarillo?
An unheated pool near Amarillo typically peaks around 79°F in high summer and bottoms out near 35°F in winter, spending roughly 1 month 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 Amarillo hits the closing window
Data: NOAA 1991–2020 climate normals via Amarillo 7ene (7.3 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.