Pool season · Oklahoma
Lawton Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
Lawton'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.
Lawton, OK — 146 swim days a yearEach dot on the bar is one week of Lawton's typical year, colored by what the model says that week is for: gray weeks are off-season, hollow teal marks the opening window (March 28–April 18), solid teal is swim season, and hollow amber is the closing window ending October 31. The black marker is today — its position against the colors is the entire executive summary.
The Lawton pool calendar
Opening — target April 4
Target April 4; the practical window runs March 28–April 18, and the 7-day mean crosses the 61°F threshold around April 18. Cold-water starts are the cheap ones.
Closing — deadline October 31
Hold the cover until October 22, then winterize by October 31, a week ahead of the November 7 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Lawton'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 40° | 41° | 49° | 57° | 66° | 76° | 82° | 85° | 80° | 69° | 57° | 45° |
Warmest water typically July–September (peaking near 85°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Edmond's pool season and Norman's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Oklahoma season index.
Lawton pool season FAQ
When should I open my pool in Lawton, OK?
Open by April 4 — the model places Lawton's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Lawton opening guide has the 12-step sequence.
When should I close my pool in Lawton?
Close by October 31: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Lawton closing guide sequences the work backward from that date.
How long is the swim season in Lawton?
Lawton averages 146 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 Lawton?
An unheated pool near Lawton typically peaks around 85°F in high summer and bottoms out near 40°F in winter, spending roughly 3 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 Lawton hits the closing window
Data: NOAA 1991–2020 climate normals via Lawton (2.2 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.