Pool season · Washington
Kent Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
Kent's whole pool calendar, condensed: when the water warms, when it cools, and where today falls between those edges. Use the opening guide and closing guide for the step-by-step work; keep this page for the dates.
Kent, WA — 0 swim days a yearThe bar compresses Kent's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the May 14–June 4 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends October 1. Wherever the today marker sits, the nearest color change is your next appointment.
The Kent pool calendar
Opening — target May 21
Open by May 21 — a two-week head start on the June 4 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline October 1
Hold the cover until September 21, then winterize by October 1, a week ahead of the November 10 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on Kent's own normals — the shape of a typical year, not a forecast. The widget above shows where the current year actually sits.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 41° | 43° | 46° | 50° | 56° | 61° | 66° | 69° | 65° | 58° | 49° | 43° |
The curve peaks near 69°F — comfortable-water months here usually involve a heater or a solar cover.
Every station tells its own story: compare this curve with Kennewick's pool season and Kirkland's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Washington season index.
Kent pool season FAQ
When should I open my pool in Kent, WA?
Open by May 21 — the model places Kent's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Kent opening guide has the 12-step sequence.
When should I close my pool in Kent?
Close by October 1: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Kent closing guide sequences the work backward from that date.
How long is the swim season in Kent?
Kent averages 0 days a year with normal highs of 80°F or better — right on the statewide median. The Washington season index ranks all 21 covered cities by the same metric.
How warm does pool water get in Kent?
An unheated pool near Kent typically peaks around 69°F in high summer and bottoms out near 41°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 Kent hits the closing window
Data: NOAA 1991–2020 climate normals via Kent (2.4 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.