Tennessee Pool Season: Opening & Closing Dates by City

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

City Opening window Closing window Season
Nashville Apr 24 – May 16 Sep 24 – Oct 11 ≈ 151 days
Memphis Apr 11 – May 1 Oct 6 – Oct 22 ≈ 176 days
Knoxville May 1 – May 23 Sep 22 – Oct 8 ≈ 141 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 Tennessee's featured cities, typical openings spread from Apr 21 to May 12, closings from Sep 30 to Oct 14, and the unheated season runs 141–176 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.

Tennessee planning pages

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