South Carolina Pool Season: Opening & Closing Dates by City

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

City Opening window Closing window Season
Columbia Mar 27 – Apr 19 Oct 12 – Oct 30 ≈ 197 days
Charleston Mar 29 – Apr 23 Oct 20 – Nov 9 ≈ 202 days
Greenville Apr 25 – May 20 Sep 23 – Oct 10 ≈ 147 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 South Carolina's featured cities, typical openings spread from Apr 7 to May 8, closings from Oct 1 to Oct 30, and the unheated season runs 147–202 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.

South Carolina planning pages

When to open — South Carolina When to close — South Carolina All states →