Pool season · North Carolina
Greenville Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
Greenville's whole pool calendar, condensed: when the water warms, when it cools, and where today falls between those edges. Use the opening guide and closing guide for the step-by-step work; keep this page for the dates.
Greenville, NC — 137 swim days a yearThe bar compresses Greenville's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the March 23–April 13 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends October 31. Wherever the today marker sits, the nearest color change is your next appointment.
The Greenville pool calendar
Opening — target March 30
Target March 30; the practical window runs March 23–April 13, and the 7-day mean crosses the 61°F threshold around April 13. Cold-water starts are the cheap ones.
Closing — deadline October 31
The window opens October 21 once water leaves the algae zone; the model deadline is October 31, a week ahead of the November 8 freeze normal.
Estimated water temperature by month
This is Greenville's typical-year water curve: the same EWMA model as the live widget, run on the 1991–2020 normals instead of this week's weather.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 44° | 44° | 49° | 58° | 66° | 74° | 80° | 80° | 77° | 68° | 57° | 49° |
Warmest water typically July–August (peaking near 81°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Greensboro's pool season and Hickory's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the North Carolina season index.
Greenville pool season FAQ
When should I open my pool in Greenville, NC?
Open by March 30 — the model places Greenville's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Greenville opening guide has the 12-step sequence.
When should I close my pool in Greenville?
Close by October 31: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Greenville closing guide sequences the work backward from that date.
How long is the swim season in Greenville?
Greenville averages 137 days a year with normal highs of 80°F or better — about 5 days earlier than the North Carolina median. The North Carolina season index ranks all 17 covered cities by the same metric.
How warm does pool water get in Greenville?
An unheated pool near Greenville typically peaks around 81°F in high summer and bottoms out near 43°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 Greenville hits the closing window
Data: NOAA 1991–2020 climate normals via Greenville (3.4 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.