Pool season · Arizona
Chandler Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
This is the one-page view of Chandler'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.
Chandler, AZ — 245 swim days a yearEach dot on the bar is one week of Chandler'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 13–March 6), solid teal is swim season, and hollow amber is the closing window ending November 28. The black marker is today — its position against the colors is the entire executive summary.
The Chandler pool calendar
Opening — target February 20
Open by February 20 — a two-week head start on the March 6 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline November 28
Hold the cover until November 18, then winterize by November 28, a week ahead of the December 5 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on Chandler'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 54° | 56° | 60° | 66° | 73° | 82° | 89° | 91° | 88° | 79° | 68° | 57° |
Warmest water typically June–October (peaking near 91°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Casas Adobes's pool season and Flagstaff's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Arizona season index.
Chandler pool season FAQ
When should I open my pool in Chandler, AZ?
Open by February 20 — the model places Chandler's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Chandler opening guide has the 12-step sequence.
When should I close my pool in Chandler?
Close by November 28: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Chandler closing guide sequences the work backward from that date.
How long is the swim season in Chandler?
Chandler averages 245 days a year with normal highs of 80°F or better — about 5 days earlier than the Arizona median. The Arizona season index ranks all 20 covered cities by the same metric.
How warm does pool water get in Chandler?
An unheated pool near Chandler typically peaks around 91°F in high summer and bottoms out near 53°F in winter, spending roughly 5 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 Chandler hits the closing window
Data: NOAA 1991–2020 climate normals via Tempe ASU (10.7 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.