How to Close Your Pool Before Oklahoma's First Hard Freeze

The single most important thing about closing a pool in Oklahoma is doing it before the first hard freeze. Water expands when it freezes, and water trapped in your pipes, pump, and filter can crack them overnight — turning a routine closing into a several-thousand-dollar repair. A proper winter closing gets the water out of everything that can freeze.

When does Oklahoma usually get its first hard freeze?

Across the Oklahoma City metro the first hard freeze typically lands in early-to-mid November, but it varies year to year and it can sneak in early. The safe move is to have the pool closed by late October or the first week of November — before a cold snap, not after the forecast scares you. For more on timing both ends of the season, see when to open and close your pool in Oklahoma.

What a proper closing actually includes

• Balance the water chemistry and add winterizing chemicals so the pool stays clean and protected through the off-season.
• Lower the water level below the skimmer and returns as needed for the cover and the climate.
• Blow out the plumbing lines and plug the returns so no water is left sitting in the pipes to freeze.
• Drain the equipment — pump, filter, heater, and chlorinator — so nothing freezes and cracks on the pad.
• Add antifreeze to the lines where appropriate as a second layer of freeze protection.
• Put the cover on — and a fitted safety cover keeps it clean and makes spring opening far easier.

Why not just leave the pump running?

Running the pump during a freeze can protect the plumbing only if the power stays on and the water keeps moving — and Oklahoma ice storms are exactly when the power goes out. The moment circulation stops in a freeze, the water in your lines is at risk. A proper closing removes that risk instead of betting on the grid.

What it costs

A pool closing is $400 for an inground pool or $250 for an above-ground pool, plus chemicals. Have a spa? Add $150 if it shares the system or $250 if it's on its own. We'll get it buttoned up right.

Get on the closing schedule

Don't wait for the first freeze warning — that's when everyone calls at once. See our pool closing service and call us to get on the schedule early.