Pool season · California
Yorba Linda Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
One bar, one year, one Yorba Linda 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.
Yorba Linda, CA — 151 swim days a yearEach dot on the bar is one week of Yorba Linda'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 8–March 1), solid teal is swim season, and hollow amber is the closing window ending December 10. The black marker is today — its position against the colors is the entire executive summary.
The Yorba Linda pool calendar
Opening — target February 15
Target February 15; the practical window runs February 8–March 1, and the 7-day mean crosses the 61°F threshold around March 1. Cold-water starts are the cheap ones.
Closing — deadline December 10
Hold the cover until November 30, then winterize by December 10, a week ahead of the December 19 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Yorba Linda'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 60° | 60° | 61° | 64° | 67° | 70° | 74° | 77° | 77° | 74° | 68° | 61° |
The curve peaks near 78°F — comfortable-water months here usually involve a heater or a solar cover.
Every station tells its own story: compare this curve with Whittier's pool season and Yuba City's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the California season index.
Yorba Linda pool season FAQ
When should I open my pool in Yorba Linda, CA?
The site model recommends opening by February 15 — about two weeks before Yorba Linda'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 Yorba Linda opening guide.
When should I close my pool in Yorba Linda?
Winterize by December 10. The model holds the deadline a week ahead of Yorba Linda's NOAA 50% first-freeze date, so the plumbing is protected before the first hard night. The full sequence is in the Yorba Linda closing guide.
How long is the swim season in Yorba Linda?
Yorba Linda averages 151 days a year with normal highs of 80°F or better — about 45 days earlier than the California median. The California season index ranks all 147 covered cities by the same metric.
How warm does pool water get in Yorba Linda?
An unheated pool near Yorba Linda typically peaks around 78°F in high summer and bottoms out near 59°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 Yorba Linda hits the closing window
Data: NOAA 1991–2020 climate normals via Anaheim (4.4 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.