Pool season · California
Redondo Beach Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
One bar, one year, one Redondo Beach 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.
Redondo Beach, CA — 0 swim days a yearEach dot on the bar is one week of Redondo Beach's typical year, colored by what the model says that week is for: gray weeks are off-season, hollow teal marks the opening window (April 10–May 1), solid teal is swim season, and hollow amber is the closing window ending November 25. The black marker is today — its position against the colors is the entire executive summary.
The Redondo Beach pool calendar
Opening — target April 17
Target April 17; the practical window runs April 10–May 1, and the 7-day mean crosses the 61°F threshold around May 1. Cold-water starts are the cheap ones.
Closing — deadline November 25
Hold the cover until November 15, then winterize by November 25, a week ahead of the January 5 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Redondo Beach'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 57° | 57° | 57° | 59° | 61° | 64° | 67° | 70° | 70° | 67° | 63° | 58° |
The curve peaks near 70°F — comfortable-water months here usually involve a heater or a solar cover.
Every station tells its own story: compare this curve with Redlands's pool season and Redwood City's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the California season index.
Redondo Beach pool season FAQ
When should I open my pool in Redondo Beach, CA?
Target April 17. That date backs off two weeks from the day Redondo Beach's 7-day mean temperature reaches 61°F, so you start up in cold, algae-resistant water. Work the full checklist in the Redondo Beach opening guide.
When should I close my pool in Redondo Beach?
The closing deadline is November 25 — late enough that the water has cooled out of the algae zone, early enough to beat Redondo Beach's first-freeze normal by about a week. See the Redondo Beach closing guide for the winterizing steps.
How long is the swim season in Redondo Beach?
Redondo Beach averages 0 days a year with normal highs of 80°F or better — about 16 days later than the California median. The California season index ranks all 147 covered cities by the same metric.
How warm does pool water get in Redondo Beach?
An unheated pool near Redondo Beach typically peaks around 70°F in high summer and bottoms out near 56°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 Redondo Beach hits the closing window
Data: NOAA 1991–2020 climate normals via Redondo Beach (1.6 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.