Pool season · New York
New Rochelle Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
New Rochelle'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.
Reading it takes ten seconds: 52 dots, one per week. Solid teal is New Rochelle's swim season; the hollow teal run before it (April 24 to May 15) is when to open; the hollow amber run after is when to close, with October 10 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The New Rochelle pool calendar
Opening — target May 1
Target May 1; the practical window runs April 24–May 15, and the 7-day mean crosses the 61°F threshold around May 15. Cold-water starts are the cheap ones.
Closing — deadline October 10
Hold the cover until September 30, then winterize by October 10, a week ahead of the October 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 New Rochelle'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 33° | 32° | 37° | 47° | 57° | 66° | 73° | 75° | 70° | 61° | 50° | 41° |
The curve peaks near 75°F — comfortable-water months here usually involve a heater or a solar cover.
Email me when New Rochelle hits the closing window
Data: NOAA 1991–2020 climate normals via Dobbs Ferry-ardsley (5.9 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.