Pool season · Colorado
Arvada Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
This is the one-page view of Arvada'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.
The bar compresses Arvada's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the May 7–May 28 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends September 28. Wherever the today marker sits, the nearest color change is your next appointment.
The Arvada pool calendar
Opening — target May 14
Open by May 14 — a two-week head start on the May 28 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline September 28
The window opens September 18 once water leaves the algae zone; the model deadline is September 28, a week ahead of the October 5 freeze normal.
Estimated water temperature by month
Monthly averages of the site's water model run on Arvada'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° | 32° | 37° | 45° | 52° | 63° | 71° | 72° | 67° | 56° | 44° | 34° |
The curve peaks near 73°F — comfortable-water months here usually involve a heater or a solar cover.
Email me when Arvada hits the closing window
Data: NOAA 1991–2020 climate normals via Wheat Ridge 2 (4.3 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.