Pool season · California
Arden-Arcade Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
This is the one-page view of Arden-Arcade'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.
Arden-Arcade, CA — 156 swim days a yearThe bar compresses Arden-Arcade's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the March 25–April 15 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends November 9. Wherever the today marker sits, the nearest color change is your next appointment.
The Arden-Arcade pool calendar
Opening — target April 1
Target April 1; the practical window runs March 25–April 15, and the 7-day mean crosses the 61°F threshold around April 15. Cold-water starts are the cheap ones.
Closing — deadline November 9
The window opens October 30 once water leaves the algae zone; the model deadline is November 9, a week ahead of the December 16 freeze normal.
Estimated water temperature by month
This is Arden-Arcade'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 48° | 51° | 56° | 59° | 65° | 71° | 77° | 78° | 76° | 70° | 60° | 51° |
Warmest water typically August–August (peaking near 78°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Apple Valley's pool season and Bakersfield's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the California season index.
Arden-Arcade pool season FAQ
When should I open my pool in Arden-Arcade, CA?
Target April 1. That date backs off two weeks from the day Arden-Arcade's 7-day mean temperature reaches 61°F, so you start up in cold, algae-resistant water. Work the full checklist in the Arden-Arcade opening guide.
When should I close my pool in Arden-Arcade?
The closing deadline is November 9 — late enough that the water has cooled out of the algae zone, early enough to beat Arden-Arcade's first-freeze normal by about a week. See the Arden-Arcade closing guide for the winterizing steps.
How long is the swim season in Arden-Arcade?
Arden-Arcade averages 156 days a year with normal highs of 80°F or better — right on the statewide median. The California season index ranks all 147 covered cities by the same metric.
How warm does pool water get in Arden-Arcade?
An unheated pool near Arden-Arcade typically peaks around 78°F in high summer and bottoms out near 48°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 Arden-Arcade hits the closing window
Data: NOAA 1991–2020 climate normals via Sacramento 5 ESE (3.6 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.