Pool season · Florida
St. Augustine Pool Season: the Year on One Bar
Last updated: July 15, 2026 · dates · water temp
This is the one-page view of St. Augustine'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.
The bar compresses St. Augustine's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the February 2–February 23 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends December 20. Wherever the today marker sits, the nearest color change is your next appointment.
The St. Augustine pool calendar
Opening — target February 9
Open by February 9 — a two-week head start on the February 23 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline December 20
Hold the cover until December 10, then winterize by December 20, a week ahead of the January 5 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is St. Augustine'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 58° | 59° | 62° | 68° | 74° | 79° | 82° | 82° | 81° | 78° | 70° | 63° |
Warmest water typically June–October (peaking near 83°F); heaters and covers shift any month up.
Email me when St. Augustine hits the closing window
Data: NOAA 1991–2020 climate normals via St Augustine Lighthouse (1.6 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.