Pool season · Ohio
Lorain Pool Season: the Year on One Bar
Last updated: July 25, 2026 · dates · water temp
Lorain'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.
Lorain, OH — 58 swim days a yearReading it takes ten seconds: 52 dots, one per week. Solid teal is Lorain's swim season; the hollow teal run before it (April 30 to May 21) is when to open; the hollow amber run after is when to close, with October 4 as the deadline; gray is the covered season. Today's marker shows where you stand in that cycle right now.
The Lorain pool calendar
Opening — target May 7
Target May 7; the practical window runs April 30–May 21, and the 7-day mean crosses the 61°F threshold around May 21. Cold-water starts are the cheap ones.
Closing — deadline October 4
The window opens September 24 once water leaves the algae zone; the model deadline is October 4, a week ahead of the October 24 freeze normal.
Estimated water temperature by month
Monthly averages of the site's water model run on Lorain'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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 29° | 27° | 33° | 44° | 55° | 65° | 72° | 71° | 67° | 58° | 47° | 37° |
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 Dayton's pool season and Mansfield's — neighboring normals stations can shift the windows by a week or more. The full ranking lives on the Ohio season index.
Lorain pool season FAQ
When should I open my pool in Lorain, OH?
The site model recommends opening by May 7 — about two weeks before Lorain's 7-day mean temperature crosses 61°F, while the water is still too cold for algae. The step-by-step sequence is in the Lorain opening guide.
When should I close my pool in Lorain?
Winterize by October 4. The model holds the deadline a week ahead of Lorain's NOAA 50% first-freeze date, so the plumbing is protected before the first hard night. The full sequence is in the Lorain closing guide.
How long is the swim season in Lorain?
Lorain averages 58 days a year with normal highs of 80°F or better — about 5 days later than the Ohio median. The Ohio season index ranks all 14 covered cities by the same metric.
How warm does pool water get in Lorain?
An unheated pool near Lorain typically peaks around 72°F in high summer and bottoms out near 26°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 Lorain hits the closing window
Data: NOAA 1991–2020 climate normals via Elyria Lorain Co Airport (6.5 mi); live outlook by Open-Meteo. Attribution: sources · assumptions: methodology.