Oklahoma Pool Season: Opening & Closing Dates by City

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

City Opening window Closing window Season
Oklahoma City Apr 24 – May 15 Sep 27 – Oct 13 ≈ 154 days
Tulsa Apr 19 – May 10 Sep 30 – Oct 16 ≈ 162 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 Oklahoma's featured cities, typical openings spread from Apr 30 to May 5, closings from Oct 5 to Oct 8, and the unheated season runs 154–162 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.

Oklahoma planning pages

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