Pool season · California
Murrieta Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
Murrieta'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.
Murrieta, CA — 141 swim days a yearThe bar compresses Murrieta's whole pool year into one lane rope: gray floats for the off-season, hollow teal for the March 23–April 13 opening window, solid teal for swim weeks, hollow amber for the closing stretch that ends December 1. Wherever the today marker sits, the nearest color change is your next appointment.
The Murrieta pool calendar
Opening — target March 30
Open by March 30 — a two-week head start on the April 13 crossing keeps startup chemistry small and beats the local service rush.
Closing — deadline December 1
Hold the cover until November 21, then winterize by December 1, a week ahead of the January 30 freeze normal. Late and cold beats early and warm.
Estimated water temperature by month
Monthly averages of the site's water model run on Murrieta'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 57° | 57° | 58° | 60° | 63° | 66° | 72° | 75° | 76° | 73° | 67° | 59° |
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 Mountain View's pool season and Napa's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the California season index.
Murrieta pool season FAQ
When should I open my pool in Murrieta, CA?
Open by March 30 — the model places Murrieta's 61°F crossing about two weeks later, and every warm day you wait pushes the water toward the 65°F algae zone. The Murrieta opening guide has the 12-step sequence.
When should I close my pool in Murrieta?
Close by December 1: cool water keeps its winter chemistry, but freeze damage is the hard stop. The Murrieta closing guide sequences the work backward from that date.
How long is the swim season in Murrieta?
Murrieta averages 141 days a year with normal highs of 80°F or better — right on the statewide median. The California season index ranks all 147 covered cities by the same metric.
How warm does pool water get in Murrieta?
An unheated pool near Murrieta typically peaks around 76°F in high summer and bottoms out near 56°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 Murrieta hits the closing window
Data: NOAA 1991–2020 climate normals via Fallbrook 5 NE (9.2 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.