Pool season · Indiana
Evansville Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
This is the one-page view of Evansville'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.
Evansville, IN — 127 swim days a yearEach dot on the bar is one week of Evansville's typical year, colored by what the model says that week is for: gray weeks are off-season, hollow teal marks the opening window (March 30–April 20), solid teal is swim season, and hollow amber is the closing window ending October 27. The black marker is today — its position against the colors is the entire executive summary.
The Evansville pool calendar
Opening — target April 6
Target April 6; the practical window runs March 30–April 20, and the 7-day mean crosses the 61°F threshold around April 20. Cold-water starts are the cheap ones.
Closing — deadline October 27
Hold the cover until October 17, then winterize by October 27, a week ahead of the November 10 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on Evansville'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 36° | 36° | 44° | 55° | 64° | 73° | 79° | 80° | 77° | 67° | 55° | 44° |
Warmest water typically July–August (peaking near 80°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Elkhart's pool season and Fishers's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Indiana season index.
Evansville pool season FAQ
When should I open my pool in Evansville, IN?
Open by April 6 — the model places Evansville's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Evansville opening guide has the 12-step sequence.
When should I close my pool in Evansville?
Close by October 27: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Evansville closing guide sequences the work backward from that date.
How long is the swim season in Evansville?
Evansville averages 127 days a year with normal highs of 80°F or better — about 25 days earlier than the Indiana median. The Indiana season index ranks all 13 covered cities by the same metric.
How warm does pool water get in Evansville?
An unheated pool near Evansville typically peaks around 80°F in high summer and bottoms out near 35°F in winter, spending roughly 2 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 Evansville hits the closing window
Data: NOAA 1991–2020 climate normals via Evansville Museum (2.7 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.