Pool season · New York
Brooklyn Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
One bar, one year, one Brooklyn 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.
Brooklyn, NY — 80 swim days a yearThe bar compresses Brooklyn's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the April 20–May 11 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends October 17. Wherever the today marker sits, the nearest color change is your next appointment.
The Brooklyn pool calendar
Opening — target April 27
Open by April 27 — a two-week head start on the May 11 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline October 17
The window opens October 7 once water leaves the algae zone; the model deadline is October 17, a week ahead of the November 19 freeze normal.
Estimated water temperature by month
This is Brooklyn'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 35° | 34° | 39° | 48° | 58° | 67° | 76° | 77° | 73° | 64° | 53° | 43° |
The curve peaks near 78°F — comfortable-water months here usually involve a heater or a solar cover.
Every station tells its own story: compare this curve with Bronx's pool season and Buffalo's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the New York season index.
Brooklyn pool season FAQ
When should I open my pool in Brooklyn, NY?
Open by April 27 — the model places Brooklyn's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Brooklyn opening guide has the 12-step sequence.
When should I close my pool in Brooklyn?
Close by October 17: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Brooklyn closing guide sequences the work backward from that date.
How long is the swim season in Brooklyn?
Brooklyn averages 80 days a year with normal highs of 80°F or better — about 9 days earlier than the New York median. The New York season index ranks all 16 covered cities by the same metric.
How warm does pool water get in Brooklyn?
An unheated pool near Brooklyn typically peaks around 78°F in high summer and bottoms out near 33°F in winter, never quite reaching the 78°F comfort line without a heater or solar cover. The month-by-month curve above shows the whole cycle; the methodology page explains the ±5°F error bars.
Email me when Brooklyn hits the closing window
Data: NOAA 1991–2020 climate normals via Ny Ave V Brooklyn (4.2 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.