Pool season · Washington
Redmond Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
This is the one-page view of Redmond'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.
Redmond, WA — 0 swim days a yearThe bar compresses Redmond's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the May 24–June 14 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 Redmond pool calendar
Opening — target May 31
Open by May 31 — a two-week head start on the June 14 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 23 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
This is Redmond'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 42° | 43° | 45° | 49° | 54° | 60° | 64° | 68° | 65° | 58° | 50° | 44° |
The curve peaks near 68°F — comfortable-water months here usually involve a heater or a solar cover.
Every station tells its own story: compare this curve with Pasco's pool season and Renton's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Washington season index.
Redmond pool season FAQ
When should I open my pool in Redmond, WA?
Open by May 31 — the model places Redmond's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Redmond opening guide has the 12-step sequence.
When should I close my pool in Redmond?
Close by October 1: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Redmond closing guide sequences the work backward from that date.
How long is the swim season in Redmond?
Redmond averages 0 days a year with normal highs of 80°F or better — about 7 days later than the Washington median. The Washington season index ranks all 21 covered cities by the same metric.
How warm does pool water get in Redmond?
An unheated pool near Redmond typically peaks around 68°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 Redmond hits the closing window
Data: NOAA 1991–2020 climate normals via Seattle Sand Pt WSFO (6.5 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.