Pool season · Arizona
Casas Adobes Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
One bar, one year, one Casas Adobes 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.
Casas Adobes, AZ — 224 swim days a yearEach dot on the bar is one week of Casas Adobes's typical year, colored by what the model says that week is for: gray weeks are off-season, hollow teal marks the opening window (February 28–March 21), solid teal is swim season, and hollow amber is the closing window ending November 23. The black marker is today — its position against the colors is the entire executive summary.
The Casas Adobes pool calendar
Opening — target March 7
Open by March 7 — a two-week head start on the March 21 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline November 23
Hold the cover until November 13, then winterize by November 23, a week ahead of the December 4 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Casas Adobes'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 51° | 53° | 57° | 64° | 71° | 81° | 87° | 86° | 84° | 77° | 66° | 55° |
Warmest water typically June–September (peaking near 88°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Buckeye's pool season and Chandler's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Arizona season index.
Casas Adobes pool season FAQ
When should I open my pool in Casas Adobes, AZ?
The site model recommends opening by March 7 — about two weeks before Casas Adobes'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 Casas Adobes opening guide.
When should I close my pool in Casas Adobes?
Winterize by November 23. The model holds the deadline a week ahead of Casas Adobes's NOAA 50% first-freeze date, so the plumbing is protected before the first hard night. The full sequence is in the Casas Adobes closing guide.
How long is the swim season in Casas Adobes?
Casas Adobes averages 224 days a year with normal highs of 80°F or better — about 10 days later than the Arizona median. The Arizona season index ranks all 20 covered cities by the same metric.
How warm does pool water get in Casas Adobes?
An unheated pool near Casas Adobes typically peaks around 88°F in high summer and bottoms out near 51°F in winter, spending roughly 4 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 Casas Adobes hits the closing window
Data: NOAA 1991–2020 climate normals via Tohono Chul (1.8 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.