Pool season · California
Long Beach Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
One bar, one year, one Long 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.
Long Beach, CA — 89 swim days a yearThe bar compresses Long Beach's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the March 9–March 30 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends November 29. Wherever the today marker sits, the nearest color change is your next appointment.
The Long Beach pool calendar
Opening — target March 16
Target March 16; the practical window runs March 9–March 30, and the 7-day mean crosses the 61°F threshold around March 30. Cold-water starts are the cheap ones.
Closing — deadline November 29
The window opens November 19 once water leaves the algae zone; the model deadline is November 29, a week ahead of the January 5 freeze normal.
Estimated water temperature by month
This is Long 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° | 59° | 61° | 64° | 67° | 71° | 74° | 74° | 71° | 65° | 58° |
The curve peaks near 74°F — comfortable-water months here usually involve a heater or a solar cover.
Every station tells its own story: compare this curve with Lodi's pool season and Los Angeles's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the California season index.
Long Beach pool season FAQ
When should I open my pool in Long Beach, CA?
Open by March 16 — the model places Long Beach's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Long Beach opening guide has the 12-step sequence.
When should I close my pool in Long Beach?
Close by November 29: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Long Beach closing guide sequences the work backward from that date.
How long is the swim season in Long Beach?
Long Beach averages 89 days a year with normal highs of 80°F or better — about 16 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 Long Beach?
An unheated pool near Long Beach typically peaks around 74°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 Long Beach hits the closing window
Data: NOAA 1991–2020 climate normals via Long Beach Daugherty Field (1.6 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.