Pool season · California
Redding Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
Redding's whole pool calendar, condensed: when the water warms, when it cools, and where today falls between those edges. Use the opening guide and closing guide for the step-by-step work; keep this page for the dates.
Redding, CA — 159 swim days a yearThe bar compresses Redding's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the April 2–April 23 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends November 4. Wherever the today marker sits, the nearest color change is your next appointment.
The Redding pool calendar
Opening — target April 9
Open by April 9 — a two-week head start on the April 23 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline November 4
Hold the cover until October 25, then winterize by November 4, a week ahead of the November 21 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Redding'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 47° | 49° | 53° | 57° | 64° | 73° | 81° | 83° | 78° | 70° | 58° | 49° |
Warmest water typically July–September (peaking near 84°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Rancho Cucamonga's pool season and Redlands's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the California season index.
Redding pool season FAQ
When should I open my pool in Redding, CA?
Target April 9. That date backs off two weeks from the day Redding's 7-day mean temperature reaches 61°F, so you start up in cold, algae-resistant water. Work the full checklist in the Redding opening guide.
When should I close my pool in Redding?
The closing deadline is November 4 — late enough that the water has cooled out of the algae zone, early enough to beat Redding's first-freeze normal by about a week. See the Redding closing guide for the winterizing steps.
How long is the swim season in Redding?
Redding averages 159 days a year with normal highs of 80°F or better — about 8 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 Redding?
An unheated pool near Redding typically peaks around 84°F in high summer and bottoms out near 46°F in winter, spending roughly 3 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 Redding hits the closing window
Data: NOAA 1991–2020 climate normals via Redding Municipal Airport (5.0 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.