Pool season · New Jersey
Trenton Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
One bar, one year, one Trenton 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.
The bar compresses Trenton's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the April 25–May 16 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends October 10. Wherever the today marker sits, the nearest color change is your next appointment.
The Trenton pool calendar
Opening — target May 2
Open by May 2 — a two-week head start on the May 16 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline October 10
Hold the cover until September 30, then winterize by October 10, a week ahead of the October 28 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on Trenton'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° | 74° | 75° | 71° | 61° | 50° | 40° |
The curve peaks near 76°F — comfortable-water months here usually involve a heater or a solar cover.
Email me when Trenton hits the closing window
Data: NOAA 1991–2020 climate normals via Trenton State College (3.6 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.