Pool season · Texas
Killeen Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
Killeen'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.
Killeen, TX — 164 swim days a yearReading it takes ten seconds: 52 dots, one per week. Solid teal is Killeen's swim season; the hollow teal run before it (March 5 to March 26) is when to open; the hollow amber run after is when to close, with November 10 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Killeen pool calendar
Opening — target March 12
Open by March 12 — a two-week head start on the March 26 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline November 10
Hold the cover until November 4, then winterize by November 10, a week ahead of the November 17 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Killeen'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 48° | 50° | 55° | 63° | 69° | 78° | 83° | 85° | 82° | 73° | 62° | 53° |
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 Irving's pool season and Laredo's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Texas season index.
Killeen pool season FAQ
When should I open my pool in Killeen, TX?
Target March 12. That date backs off two weeks from the day Killeen's 7-day mean temperature reaches 61°F, so you start up in cold, algae-resistant water. Work the full checklist in the Killeen opening guide.
When should I close my pool in Killeen?
The closing deadline is November 10 — late enough that the water has cooled out of the algae zone, early enough to beat Killeen's first-freeze normal by about a week. See the Killeen closing guide for the winterizing steps.
How long is the swim season in Killeen?
Killeen averages 164 days a year with normal highs of 80°F or better — about 4 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 Killeen?
An unheated pool near Killeen 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 Killeen hits the closing window
Data: NOAA 1991–2020 climate normals via Killeen (2.4 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.