Pool season · North Carolina
Durham Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
Durham'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.
Reading it takes ten seconds: 52 dots, one per week. Solid teal is Durham's swim season; the hollow teal run before it (April 5 to April 26) is when to open; the hollow amber run after is when to close, with October 20 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Durham pool calendar
Opening — target April 12
Open by April 12 — a two-week head start on the April 26 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline October 20
The window opens October 10 once water leaves the algae zone; the model deadline is October 20, a week ahead of the November 4 freeze normal.
Estimated water temperature by month
Monthly averages of the site's water model run on Durham's own normals — the shape of a typical year, not a forecast. The widget above shows where the current year actually sits.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 40° | 39° | 45° | 54° | 63° | 70° | 77° | 77° | 73° | 65° | 53° | 45° |
The curve peaks near 78°F — comfortable-water months here usually involve a heater or a solar cover.
Email me when Durham hits the closing window
Data: NOAA 1991–2020 climate normals via Durham (5.5 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.