Pool season · Colorado
Colorado Springs Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
One bar, one year, one Colorado Springs pool. The season bar below draws everything the model knows — opening window, prime season, closing window — against today's date, with the working details one click away on the opening and closing pages.
Colorado Springs, CO — 90 swim days a yearReading it takes ten seconds: 52 dots, one per week. Solid teal is Colorado Springs's swim season; the hollow teal run before it (May 6 to May 27) is when to open; the hollow amber run after is when to close, with October 1 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Colorado Springs pool calendar
Opening — target May 13
Target May 13; the practical window runs May 6–May 27, and the 7-day mean crosses the 61°F threshold around May 27. Cold-water starts are the cheap ones.
Closing — deadline October 1
The window opens September 21 once water leaves the algae zone; the model deadline is October 1, a week ahead of the October 8 freeze normal.
Estimated water temperature by month
Monthly averages of the site's water model run on Colorado Springs'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 31° | 32° | 37° | 45° | 52° | 63° | 71° | 72° | 67° | 57° | 45° | 34° |
The curve peaks near 72°F — comfortable-water months here usually involve a heater or a solar cover.
Every station tells its own story: compare this curve with Centennial's pool season and Denver's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Colorado season index.
Colorado Springs pool season FAQ
When should I open my pool in Colorado Springs, CO?
The site model recommends opening by May 13 — about two weeks before Colorado Springs'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 Colorado Springs opening guide.
When should I close my pool in Colorado Springs?
Winterize by October 1. The model holds the deadline a week ahead of Colorado Springs's NOAA 50% first-freeze date, so the plumbing is protected before the first hard night. The full sequence is in the Colorado Springs closing guide.
How long is the swim season in Colorado Springs?
Colorado Springs averages 90 days a year with normal highs of 80°F or better — right on the statewide median. The Colorado season index ranks all 19 covered cities by the same metric.
How warm does pool water get in Colorado Springs?
An unheated pool near Colorado Springs typically peaks around 72°F in high summer and bottoms out near 31°F in winter, never quite reaching the 78°F comfort line without a heater or solar cover. The month-by-month curve above shows the whole cycle; the methodology page explains the ±5°F error bars.
Email me when Colorado Springs hits the closing window
Data: NOAA 1991–2020 climate normals via Colorado Springs Municipal Airport (5.5 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.