Pool season · Texas
Round Rock Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
This is the one-page view of Round Rock's pool year: both model windows, the estimated water-temperature curve, and today's live position on the season bar. The detailed checklists live on the opening and closing guides; this page is the calendar you check between them.
Reading it takes ten seconds: 52 dots, one per week. Solid teal is Round Rock's swim season; the hollow teal run before it (February 28 to March 21) is when to open; the hollow amber run after is when to close, with November 13 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Round Rock pool calendar
Opening — target March 7
Open by March 7 — a two-week head start on the March 21 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline November 13
Hold the cover until November 5, then winterize by November 13, a week ahead of the November 20 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Round Rock'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 48° | 51° | 57° | 64° | 70° | 79° | 83° | 85° | 81° | 74° | 63° | 53° |
Warmest water typically June–September (peaking near 85°F); heaters and covers shift any month up.
Email me when Round Rock hits the closing window
Data: NOAA 1991–2020 climate normals via Austin Great Hills (9.9 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.