Pool season · California
Carlsbad Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
This is the one-page view of Carlsbad's pool year: both model windows, the estimated water-temperature curve, and today's live position on the season bar. The detailed checklists live on the opening and closing guides; this page is the calendar you check between them.
The bar compresses Carlsbad's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the April 7–April 28 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends November 24. Wherever the today marker sits, the nearest color change is your next appointment.
The Carlsbad pool calendar
Opening — target April 14
Target April 14; the practical window runs April 7–April 28, and the 7-day mean crosses the 61°F threshold around April 28. Cold-water starts are the cheap ones.
Closing — deadline November 24
Hold the cover until November 14, then winterize by November 24, a week ahead of the December 11 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Carlsbad'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 56° | 56° | 57° | 59° | 61° | 64° | 68° | 70° | 70° | 68° | 64° | 58° |
The curve peaks near 71°F — comfortable-water months here usually involve a heater or a solar cover.
Email me when Carlsbad hits the closing window
Data: NOAA 1991–2020 climate normals via Carlsbad Palomar Airport (0.3 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.