Pool season · North Carolina
Apex Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
Apex'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.
Apex, NC — 122 swim days a yearThe bar compresses Apex's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the March 31–April 21 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends October 24. Wherever the today marker sits, the nearest color change is your next appointment.
The Apex pool calendar
Opening — target April 7
Target April 7; the practical window runs March 31–April 21, and the 7-day mean crosses the 61°F threshold around April 21. Cold-water starts are the cheap ones.
Closing — deadline October 24
The window opens October 14 once water leaves the algae zone; the model deadline is October 24, a week ahead of the November 8 freeze normal.
Estimated water temperature by month
Monthly averages of the site's water model run on Apex'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 42° | 42° | 47° | 56° | 64° | 72° | 78° | 79° | 75° | 66° | 55° | 47° |
Warmest water typically July–August (peaking near 79°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Winston-Salem's pool season and Asheville's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the North Carolina season index.
Apex pool season FAQ
When should I open my pool in Apex, NC?
Open by April 7 — the model places Apex's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Apex opening guide has the 12-step sequence.
When should I close my pool in Apex?
Close by October 24: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Apex closing guide sequences the work backward from that date.
How long is the swim season in Apex?
Apex averages 122 days a year with normal highs of 80°F or better — right on the statewide median. The North Carolina season index ranks all 17 covered cities by the same metric.
How warm does pool water get in Apex?
An unheated pool near Apex typically peaks around 79°F in high summer and bottoms out near 41°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 Apex hits the closing window
Data: NOAA 1991–2020 climate normals via Apex (2.5 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.