Pool season · Oklahoma
Oklahoma City Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
This is the one-page view of Oklahoma City's pool year: both model windows, the estimated water-temperature curve, and today's live position on the season bar. The detailed checklists live on the opening and closing guides; this page is the calendar you check between them.
Oklahoma City, OK — 130 swim days a yearReading it takes ten seconds: 52 dots, one per week. Solid teal is Oklahoma City's swim season; the hollow teal run before it (April 2 to April 23) is when to open; the hollow amber run after is when to close, with October 26 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Oklahoma City pool calendar
Opening — target April 9
Target April 9; the practical window runs April 2–April 23, and the 7-day mean crosses the 61°F threshold around April 23. Cold-water starts are the cheap ones.
Closing — deadline October 26
Hold the cover until October 16, then winterize by October 26, a week ahead of the November 2 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Oklahoma City'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 38° | 40° | 47° | 56° | 64° | 73° | 80° | 82° | 77° | 67° | 55° | 44° |
Warmest water typically July–August (peaking near 82°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Norman's pool season and Tulsa's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Oklahoma season index.
Oklahoma City pool season FAQ
When should I open my pool in Oklahoma City, OK?
The site model recommends opening by April 9 — about two weeks before Oklahoma City'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 Oklahoma City opening guide.
When should I close my pool in Oklahoma City?
Winterize by October 26. The model holds the deadline a week ahead of Oklahoma City's NOAA 50% first-freeze date, so the plumbing is protected before the first hard night. The full sequence is in the Oklahoma City closing guide.
How long is the swim season in Oklahoma City?
Oklahoma City averages 130 days a year with normal highs of 80°F or better — right on the statewide median. The Oklahoma season index ranks all 6 covered cities by the same metric.
How warm does pool water get in Oklahoma City?
An unheated pool near Oklahoma City typically peaks around 82°F in high summer and bottoms out near 38°F in winter, spending roughly 2 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 Oklahoma City hits the closing window
Data: NOAA 1991–2020 climate normals via Oklahoma City Will Rogers Airport (7.3 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.