Pool season · Indiana
Lafayette Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
This is the one-page view of Lafayette's pool year: both model windows, the estimated water-temperature curve, and today's live position on the season bar. The detailed checklists live on the opening and closing guides; this page is the calendar you check between them.
Lafayette, IN — 91 swim days a yearEach dot on the bar is one week of Lafayette's typical year, colored by what the model says that week is for: gray weeks are off-season, hollow teal marks the opening window (April 24–May 15), solid teal is swim season, and hollow amber is the closing window ending October 8. The black marker is today — its position against the colors is the entire executive summary.
The Lafayette 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 8
Hold the cover until September 28, then winterize by October 8, a week ahead of the October 18 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Lafayette'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 28° | 27° | 35° | 46° | 57° | 67° | 73° | 73° | 69° | 60° | 47° | 36° |
The curve peaks near 74°F — comfortable-water months here usually involve a heater or a solar cover.
Every station tells its own story: compare this curve with Indianapolis's pool season and Muncie's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Indiana season index.
Lafayette pool season FAQ
When should I open my pool in Lafayette, IN?
The site model recommends opening by May 1 — about two weeks before Lafayette's 7-day mean temperature crosses 61°F, while the water is still too cold for algae. The step-by-step sequence is in the Lafayette opening guide.
When should I close my pool in Lafayette?
Winterize by October 8. The model holds the deadline a week ahead of Lafayette's NOAA 50% first-freeze date, so the plumbing is protected before the first hard night. The full sequence is in the Lafayette closing guide.
How long is the swim season in Lafayette?
Lafayette averages 91 days a year with normal highs of 80°F or better — right on the statewide median. The Indiana season index ranks all 13 covered cities by the same metric.
How warm does pool water get in Lafayette?
An unheated pool near Lafayette typically peaks around 74°F in high summer and bottoms out near 26°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 Lafayette hits the closing window
Data: NOAA 1991–2020 climate normals via Lafayette Purdue University Airport (4.2 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.