Pool season · Colorado
Aurora Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
Aurora'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.
The bar compresses Aurora's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the May 8–May 29 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends October 1. Wherever the today marker sits, the nearest color change is your next appointment.
The Aurora pool calendar
Opening — target May 15
Open by May 15 — a two-week head start on the May 29 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline October 1
The window opens September 22 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 Aurora'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 32° | 33° | 38° | 45° | 52° | 63° | 72° | 73° | 68° | 57° | 45° | 35° |
The curve peaks near 74°F — comfortable-water months here usually involve a heater or a solar cover.
Email me when Aurora hits the closing window
Data: NOAA 1991–2020 climate normals via Cherry Creek Dam (8.1 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.