Pool season · Connecticut
Norwich Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
One bar, one year, one Norwich 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.
Reading it takes ten seconds: 52 dots, one per week. Solid teal is Norwich's swim season; the hollow teal run before it (May 1 to May 22) is when to open; the hollow amber run after is when to close, with October 7 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Norwich pool calendar
Opening — target May 8
Target May 8; the practical window runs May 1–May 22, and the 7-day mean crosses the 61°F threshold around May 22. Cold-water starts are the cheap ones.
Closing — deadline October 7
Hold the cover until September 27, then winterize by October 7, a week ahead of the October 24 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Norwich'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 32° | 30° | 35° | 44° | 55° | 64° | 73° | 74° | 69° | 59° | 48° | 39° |
The curve peaks near 75°F — comfortable-water months here usually involve a heater or a solar cover.
Email me when Norwich hits the closing window
Data: NOAA 1991–2020 climate normals via Norwich Public Utility Plt (2.0 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.