Indiana Pool Season: Opening & Closing Dates by City

Local dates for every featured Indiana city — when the water warms up, when it cools off, and how long the season actually lasts.

City Opening window Closing window Season
Indianapolis May 15 – Jun 4 Sep 5 – Sep 25 ≈ 116 days
Fort Wayne May 18 – Jun 6 Sep 1 – Sep 22 ≈ 110 days
Evansville Apr 24 – May 15 Sep 28 – Oct 14 ≈ 155 days

Windows show the stretch when each city's daily average passes through the low-to-mid 60s°F (1991–2020 NOAA records, nearest station to each city). Click a city for its month-by-month table and full season notes.

Season geography

Across Indiana's featured cities, typical openings spread from May 5 to May 28, closings from Sep 14 to Oct 6, and the unheated season runs 110–155 days depending on where you are. Elevation, coastal water, and urban heat all pull real dates around, which is exactly why a state-level answer isn't enough.

For your exact town, the pool season lookup takes a ZIP code. Opening day itself is a chemistry job — the dosing calculator turns your first test reading of the year into exact amounts.

Indiana planning pages

When to open — Indiana When to close — Indiana All states →