Pool season · California
Carmichael Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
One bar, one year, one Carmichael 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.
Carmichael, CA — 156 swim days a yearReading it takes ten seconds: 52 dots, one per week. Solid teal is Carmichael's swim season; the hollow teal run before it (March 25 to April 15) is when to open; the hollow amber run after is when to close, with November 9 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Carmichael pool calendar
Opening — target April 1
Open by April 1 — a two-week head start on the April 15 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline November 9
Hold the cover until October 30, then winterize by November 9, a week ahead of the December 16 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Carmichael'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 Carlsbad's pool season and Carson's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the California season index.
Carmichael pool season FAQ
When should I open my pool in Carmichael, CA?
Open by April 1 — the model places Carmichael's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Carmichael opening guide has the 12-step sequence.
When should I close my pool in Carmichael?
Close by November 9: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Carmichael closing guide sequences the work backward from that date.
How long is the swim season in Carmichael?
Carmichael 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 Carmichael?
An unheated pool near Carmichael 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 Carmichael hits the closing window
Data: NOAA 1991–2020 climate normals via Sacramento 5 ESE (7.2 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.