Pool season · Tennessee
Kingsport Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
This is the one-page view of Kingsport'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.
Kingsport, TN — 118 swim days a yearThe bar compresses Kingsport's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the April 6–April 27 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends October 19. Wherever the today marker sits, the nearest color change is your next appointment.
The Kingsport pool calendar
Opening — target April 13
Open by April 13 — a two-week head start on the April 27 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline October 19
Hold the cover until October 9, then winterize by October 19, a week ahead of the October 29 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Kingsport'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 38° | 38° | 44° | 53° | 62° | 70° | 76° | 76° | 73° | 64° | 52° | 43° |
The curve peaks near 76°F — comfortable-water months here usually involve a heater or a solar cover.
Every station tells its own story: compare this curve with Johnson City's pool season and Knoxville's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Tennessee season index.
Kingsport pool season FAQ
When should I open my pool in Kingsport, TN?
The site model recommends opening by April 13 — about two weeks before Kingsport'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 Kingsport opening guide.
When should I close my pool in Kingsport?
Winterize by October 19. The model holds the deadline a week ahead of Kingsport's NOAA 50% first-freeze date, so the plumbing is protected before the first hard night. The full sequence is in the Kingsport closing guide.
How long is the swim season in Kingsport?
Kingsport averages 118 days a year with normal highs of 80°F or better — about 4 days later than the Tennessee median. The Tennessee season index ranks all 14 covered cities by the same metric.
How warm does pool water get in Kingsport?
An unheated pool near Kingsport typically peaks around 76°F in high summer and bottoms out near 37°F in winter, never quite reaching the 78°F comfort line without a heater or solar cover. The month-by-month curve above shows the whole cycle; the methodology page explains the ±5°F error bars.
Email me when Kingsport hits the closing window
Data: NOAA 1991–2020 climate normals via Kingsport (1.0 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.