Pool season · Florida
Deltona Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
One bar, one year, one Deltona pool. The season bar below draws everything the model knows — opening window, prime season, closing window — against today's date, with the working details one click away on the opening and closing pages.
Deltona, FL — 214 swim days a yearEach dot on the bar is one week of Deltona's typical year, colored by what the model says that week is for: gray weeks are off-season, hollow teal marks the opening window (January 17–February 7), solid teal is swim season, and hollow amber is the closing window ending December 31. The black marker is today — its position against the colors is the entire executive summary.
The Deltona pool calendar
Opening — target January 24
Open by January 24 — a two-week head start on the February 7 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline December 31
The window opens December 25 once water leaves the algae zone; the model deadline is December 31, a week ahead of the January 12 freeze normal.
Estimated water temperature by month
This is Deltona'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 60° | 61° | 64° | 69° | 74° | 80° | 82° | 83° | 82° | 79° | 71° | 65° |
Warmest water typically June–October (peaking near 83°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Delray Beach's pool season and Doral's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Florida season index.
Deltona pool season FAQ
When should I open my pool in Deltona, FL?
Open by January 24 — the model places Deltona's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Deltona opening guide has the 12-step sequence.
When should I close my pool in Deltona?
Close by December 31: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Deltona closing guide sequences the work backward from that date.
How long is the swim season in Deltona?
Deltona averages 214 days a year with normal highs of 80°F or better — right on the statewide median. The Florida season index ranks all 64 covered cities by the same metric.
How warm does pool water get in Deltona?
An unheated pool near Deltona typically peaks around 83°F in high summer and bottoms out near 60°F in winter, spending roughly 5 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 Deltona hits the closing window
Data: NOAA 1991–2020 climate normals via Sanford (7.3 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.