Pool season · California
Lodi Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
One bar, one year, one Lodi 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.
Lodi, CA — 159 swim days a yearReading it takes ten seconds: 52 dots, one per week. Solid teal is Lodi's swim season; the hollow teal run before it (March 29 to April 19) is when to open; the hollow amber run after is when to close, with November 6 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Lodi pool calendar
Opening — target April 5
Target April 5; the practical window runs March 29–April 19, and the 7-day mean crosses the 61°F threshold around April 19. Cold-water starts are the cheap ones.
Closing — deadline November 6
Hold the cover until October 27, then winterize by November 6, a week ahead of the December 5 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Lodi'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° | 50° | 55° | 59° | 64° | 70° | 75° | 76° | 74° | 69° | 59° | 50° |
The curve peaks near 76°F — comfortable-water months here usually involve a heater or a solar cover.
Every station tells its own story: compare this curve with Livermore's pool season and Long Beach's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the California season index.
Lodi pool season FAQ
When should I open my pool in Lodi, CA?
Open by April 5 — the model places Lodi's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Lodi opening guide has the 12-step sequence.
When should I close my pool in Lodi?
Close by November 6: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Lodi closing guide sequences the work backward from that date.
How long is the swim season in Lodi?
Lodi averages 159 days a year with normal highs of 80°F or better — about 4 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 Lodi?
An unheated pool near Lodi typically peaks around 76°F in high summer and bottoms out near 47°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 Lodi hits the closing window
Data: NOAA 1991–2020 climate normals via Lodi (1.1 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.