Pool season · California
Los Angeles Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
Los Angeles'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.
Each dot on the bar is one week of Los Angeles's typical year, colored by what the model says that week is for: gray weeks are off-season, hollow teal marks the opening window (March 15–April 5), solid teal is swim season, and hollow amber is the closing window ending December 8. The black marker is today — its position against the colors is the entire executive summary.
The Los Angeles pool calendar
Opening — target March 22
Target March 22; the practical window runs March 15–April 5, and the 7-day mean crosses the 61°F threshold around April 5. Cold-water starts are the cheap ones.
Closing — deadline December 8
Hold the cover until November 28, then winterize by December 8, a week ahead of the December 26 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on Los Angeles's own normals — the shape of a typical year, not a forecast. The widget above shows where the current year actually sits.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 60° | 59° | 59° | 61° | 63° | 64° | 68° | 70° | 71° | 69° | 66° | 61° |
The curve peaks near 71°F — comfortable-water months here usually involve a heater or a solar cover.
Email me when Los Angeles hits the closing window
Data: NOAA 1991–2020 climate normals via U C L A (3.7 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.