Pool season · Kansas
Topeka Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
This is the one-page view of Topeka'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.
Topeka, KS — 114 swim days a yearReading it takes ten seconds: 52 dots, one per week. Solid teal is Topeka's swim season; the hollow teal run before it (April 15 to May 6) is when to open; the hollow amber run after is when to close, with October 15 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Topeka pool calendar
Opening — target April 22
Open by April 22 — a two-week head start on the May 6 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline October 15
Hold the cover until October 6, then winterize by October 15, a week ahead of the October 22 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Topeka'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 30° | 31° | 39° | 51° | 60° | 71° | 77° | 78° | 73° | 63° | 49° | 38° |
Warmest water typically August–August (peaking near 79°F); heaters and covers shift any month up.
Every station tells its own story: compare this curve with Overland Park's pool season and Wichita's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Kansas season index.
Topeka pool season FAQ
When should I open my pool in Topeka, KS?
Open by April 22 — the model places Topeka's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Topeka opening guide has the 12-step sequence.
When should I close my pool in Topeka?
Close by October 15: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Topeka closing guide sequences the work backward from that date.
How long is the swim season in Topeka?
Topeka averages 114 days a year with normal highs of 80°F or better — right on the statewide median. The Kansas season index ranks all 6 covered cities by the same metric.
How warm does pool water get in Topeka?
An unheated pool near Topeka typically peaks around 79°F in high summer and bottoms out near 29°F in winter, spending roughly 1 month 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 Topeka hits the closing window
Data: NOAA 1991–2020 climate normals via Topeka - NWS (4.3 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.