Pool season · Louisiana
Hammond Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
One bar, one year, one Hammond 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.
Hammond, LA — 175 swim days a yearThe bar compresses Hammond's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the February 28–March 21 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends November 12. Wherever the today marker sits, the nearest color change is your next appointment.
The Hammond pool calendar
Opening — target March 7
Open by March 7 — a two-week head start on the March 21 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline November 12
Hold the cover until November 4, then winterize by November 12, a week ahead of the November 19 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Hammond'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 50° | 51° | 57° | 63° | 70° | 77° | 81° | 82° | 80° | 73° | 62° | 55° |
Warmest water typically July–September (peaking near 82°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Baton Rouge's pool season and Houma's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Louisiana season index.
Hammond pool season FAQ
When should I open my pool in Hammond, LA?
Open by March 7 — the model places Hammond's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Hammond opening guide has the 12-step sequence.
When should I close my pool in Hammond?
Close by November 12: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Hammond closing guide sequences the work backward from that date.
How long is the swim season in Hammond?
Hammond averages 175 days a year with normal highs of 80°F or better — about 4 days later than the Louisiana median. The Louisiana season index ranks all 13 covered cities by the same metric.
How warm does pool water get in Hammond?
An unheated pool near Hammond typically peaks around 82°F in high summer and bottoms out near 50°F in winter, spending roughly 3 months at or above the 78°F comfort line most swimmers prefer. The month-by-month curve above shows the whole cycle; the methodology page explains the ±5°F error bars.
Email me when Hammond hits the closing window
Data: NOAA 1991–2020 climate normals via Hammond 5 E (4.7 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.