Pool season · Texas
Frisco Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
This is the one-page view of Frisco'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.
Frisco, TX — 154 swim days a yearThe bar compresses Frisco's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the March 5–March 26 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends November 9. Wherever the today marker sits, the nearest color change is your next appointment.
The Frisco pool calendar
Opening — target March 12
Open by March 12 — a two-week head start on the March 26 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline November 9
The window opens October 30 once water leaves the algae zone; the model deadline is November 9, a week ahead of the November 21 freeze normal.
Estimated water temperature by month
This is Frisco'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 46° | 48° | 54° | 62° | 69° | 78° | 83° | 86° | 81° | 72° | 61° | 51° |
Warmest water typically June–September (peaking near 86°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Fort Worth's pool season and Galveston's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Texas season index.
Frisco pool season FAQ
When should I open my pool in Frisco, TX?
The site model recommends opening by March 12 — about two weeks before Frisco's 7-day mean temperature crosses 61°F, while the water is still too cold for algae. The step-by-step sequence is in the Frisco opening guide.
When should I close my pool in Frisco?
Winterize by November 9. The model holds the deadline a week ahead of Frisco's NOAA 50% first-freeze date, so the plumbing is protected before the first hard night. The full sequence is in the Frisco closing guide.
How long is the swim season in Frisco?
Frisco averages 154 days a year with normal highs of 80°F or better — about 4 days later than the Texas median. The Texas season index ranks all 68 covered cities by the same metric.
How warm does pool water get in Frisco?
An unheated pool near Frisco typically peaks around 86°F in high summer and bottoms out near 46°F in winter, spending roughly 4 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 Frisco hits the closing window
Data: NOAA 1991–2020 climate normals via Richardson (11.9 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.