Pool season · Colorado
Loveland Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
This is the one-page view of Loveland'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.
Loveland, CO — 98 swim days a yearThe bar compresses Loveland's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the May 10–May 31 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends September 24. Wherever the today marker sits, the nearest color change is your next appointment.
The Loveland pool calendar
Opening — target May 17
Open by May 17 — a two-week head start on the May 31 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline September 24
Hold the cover until September 17, then winterize by September 24, a week ahead of the October 1 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on Loveland'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 28° | 29° | 35° | 44° | 51° | 62° | 70° | 71° | 66° | 55° | 42° | 32° |
The curve peaks near 72°F — comfortable-water months here usually involve a heater or a solar cover.
Every station tells its own story: compare this curve with Longmont's pool season and Pueblo's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Colorado season index.
Loveland pool season FAQ
When should I open my pool in Loveland, CO?
Target May 17. That date backs off two weeks from the day Loveland's 7-day mean temperature reaches 61°F, so you start up in cold, algae-resistant water. Work the full checklist in the Loveland opening guide.
When should I close my pool in Loveland?
The closing deadline is September 24 — late enough that the water has cooled out of the algae zone, early enough to beat Loveland's first-freeze normal by about a week. See the Loveland closing guide for the winterizing steps.
How long is the swim season in Loveland?
Loveland averages 98 days a year with normal highs of 80°F or better — about 4 days later than the Colorado median. The Colorado season index ranks all 19 covered cities by the same metric.
How warm does pool water get in Loveland?
An unheated pool near Loveland typically peaks around 72°F in high summer and bottoms out near 28°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 Loveland hits the closing window
Data: NOAA 1991–2020 climate normals via Loveland 2n (1.7 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.