Winter closing is not one universal checklist. The right method depends first on whether you own a seasonal soft-sided or frame pool that should be stored, or a permanent steel-wall pool designed to remain standing.
How To Winterize An Above Ground Pool: Quick Answer
To learn how to winterize an above ground pool safely, start with the exact pool, pump, filter, skimmer, and cover manuals. Many seasonal Intex- or Bestway-style pools should be drained, dried, disassembled, and stored before freezing, while permanent steel-wall pools usually remain standing and should not be completely emptied. Clean the pool, test the water, use closing products only as their labels direct, and adjust the water level only if the pool and cover instructions require it. Then disconnect power, drain equipment and hoses, protect the skimmer and return with approved parts, install the correct cover, and inspect the closed pool after storms and freeze-thaw cycles.
| Your Pool | Usual Winter Direction | What Controls The Decision |
|---|---|---|
| Seasonal soft-sided or frame pool | Often drain, dry, disassemble, and store | Exact model manual |
| Permanent steel-wall pool | Usually close in place with water supporting the structure | Pool, liner, fitting, and cover instructions |
| Pool in a mild climate | May remain operating or use a lighter closing plan | Local freeze risk and equipment manuals |
That distinction is the most important part of how to winterize an above ground pool. If you copy a permanent-pool closing procedure onto a seasonal vinyl pool—or empty a steel-wall pool that should remain supported—you can create the damage you were trying to prevent.
Decide Whether The Pool Stays Up Or Comes Down
Find the model number before buying plugs, a cover, or a closing kit. It may be printed on the liner, frame label, pump housing, original carton, receipt, or manual.
Seasonal Soft-Sided And Frame Pools
Many portable pools are meant to be taken down before freezing weather. An Intex model manual says to drain, disassemble, and store that pool when temperatures fall below the manual’s stated threshold. Bestway also recommends winter takedown for many of its seasonal pools and provides a pool takedown and storage guide.
Those instructions support a decision process, not a rule for every model:
- Find the exact manual.
- Confirm whether freezing requires disassembly.
- Use the approved drain outlet or method.
- Clean and dry the liner completely.
- Store the liner, frame, pump, filter, hoses, and fittings in a dry protected place.
Do not fold a damp liner into a sealed box. Trapped moisture can lead to odor, mold, stuck surfaces, and material damage. Also avoid dragging the liner over rough ground or folding it around sharp fittings.
Permanent Steel-Wall Pools
A steel-wall pool designed to stay installed normally follows an in-place closing plan. Water helps support the liner and wall, so complete draining is not a safe default. The pool manufacturer, liner instructions, skimmer and return protection method, and cover design should determine the closing setup.
If the wall is damaged, the liner is pulling away, the ground has shifted, or the pool has rigid or buried plumbing you do not understand, stop and contact a qualified above-ground pool installer. Winter is the wrong time to experiment with a stressed wall or unsupported liner.
Mild-Climate Pools
Some owners do not fully close because freezing is rare and the pool can continue circulating. That still requires a freeze plan. A short cold event can damage a pump or filter that retains water. Follow the equipment manufacturer’s instructions for temporary freezes, confirm that power is reliable, and do not assume that simply running the pump solves every exposure or outage risk.
When To Winterize An Above Ground Pool
The best time is after regular swimming ends but before sustained freezing can reach the equipment or exposed plumbing. A calendar date is less useful than local conditions.
Use these signals:
- Night temperatures are trending down.
- Swimming has stopped for the season.
- Leaves and debris are becoming harder to control.
- Your equipment manual’s freeze precautions are becoming relevant.
- You still have enough mild weather to clean, dry, drain, and store components safely.
Do not close a dirty pool weeks early merely because the supplies are ready. Warm water under a cover can still support algae. On the other hand, waiting until a hose or pump housing has already frozen leaves no margin for careful work.
Planning how to winterize an above ground pool a few days ahead gives you time to locate manuals, replace a missing approved plug, clean the filter, and let removable parts dry.
What You Need Before You Start
Gather the instructions and tools before switching off the system:
- Exact pool, pump, filter, skimmer, return, salt system, heater, and cover manuals
- A reliable pool water test kit
- Leaf net, pool-safe brush, and suitable vacuum
- Manufacturer-approved plugs, caps, or winter fittings
- Containers or labeled bags for drain plugs, clamps, adapters, and O-rings
- Cleaning supplies approved for the liner and equipment
- A compatible winter cover for a pool that stays up
- A clean, dry indoor storage area for removable equipment
Avoid assuming that a generic winterizing kit fits your wall fitting, return, skimmer, or pump. A nearly correct plug can leak, become dislodged, or damage a fitting.
Step 1: Clean The Pool Thoroughly
Remove leaves, insects, sediment, and visible debris before covering the water. Brush the liner gently with a tool approved for vinyl and clean the waterline without using abrasive pads or unapproved household cleaners.
Vacuum the floor if the equipment and water condition allow it. If the pool is already green or heavily contaminated, do not hide the problem under the cover. Diagnose and clean it first. Organic debris left for months can stain the liner, consume sanitizer, and make spring water harder to recover.
The same habits used in an above-ground pool weekly maintenance checklist make closing easier: remove debris, observe water clarity, check circulation, and deal with small problems before they become seasonal ones.
Step 2: Test And Correct The Water
Test before adding a winter product. At minimum, use a method that gives you useful chlorine, pH, alkalinity, and stabilizer context for your pool and products. A vague strip color or one chlorine number may not explain cloudy, green, or scaling water.
If your current kit cannot answer the problem you see, choose a more suitable option using this guide to the best pool test kit for an above-ground pool.
Correct only verified conditions, using instructions written for the products and pool surface you own. This guide does not give one closing range for every pool because product systems, water sources, sanitizers, liners, and climates differ.
Do not cover water that is visibly green, cloudy for an unknown reason, or full of debris and assume winter chemicals will repair it. If the pool repeatedly turns green, use a diagnosis guide such as why a pool keeps turning green before closing.
Step 3: Use Closing Products Only As Directed
A closing kit is a bundle, not a diagnosis. Your pool may need some of its contents, different quantities, or none of a particular product. Base the decision on current testing, water volume, sanitation system, product compatibility, and the label.
Review the role of pool chemicals for above-ground pools before treating. Add only products that address a verified need or a clearly labeled closing purpose.
Follow these safety rules:
- Read every label before opening containers.
- Use the pool volume and current test results required by the label.
- Never mix concentrated pool products together.
- Do not pour one product into residue from another.
- Do not assume shock and algaecide can be added together.
- Follow each label’s circulation, separation, application, and re-entry directions.
- Keep children and pets away during treatment and closing.
If more than one adjustment is required, use the safe decision process in what order to add pool chemicals. There is no single universal order or waiting time that overrides the labels.
Step 4: Adjust The Water Level Only If Required
Do not use a viral “lower it by this many inches” rule. The correct water level depends on:
- Whether the pool is being stored or left assembled
- The wall and liner design
- The skimmer and return protection system
- Whether plugs or a skimmer protector are approved
- The winter cover type
- The pool manufacturer’s closing instructions
- Expected precipitation and freeze conditions
Some cover systems require a different level than others, and some do not require the same lowering at all. Hayward’s pool closing overview specifically tells owners to check the cover manufacturer rather than treating one level as universal.
For a permanent steel-wall pool, do not completely drain the pool unless its manufacturer or a qualified installer specifically directs it. An empty liner can shrink, shift, float from groundwater, or lose wall support.
For a seasonal pool being stored, drain through the approved outlet and route water according to local rules. Keep discharge away from the house, pool base, neighboring property, septic areas, and places where erosion can undermine the site.
Step 5: Shut Down, Clean, And Drain The Equipment
Small amounts of trapped water can cause expensive equipment damage. Before servicing anything, disconnect electrical power and relieve system pressure according to the equipment manuals.
Pump
Turn off power at the correct disconnect or breaker. Drain the pump housing using the model’s drain plugs or approved method. Keep plugs with the pump so they are not lost.
The Pentair SuperFlo pump manual illustrates the model-specific approach: disconnect power, remove the drain plugs, drain the housing, and protect the motor from severe weather. It also warns against wrapping the motor in airtight material. Use your own pump manual rather than copying its plug count or storage method.
Sand Filter
Clean or backwash the filter as its condition and manual require. If you need the operating sequence, follow the detailed guide for how to backwash a sand filter, then return to the exact model’s closing steps.
Drain the tank and valve by the manufacturer’s method. The Hayward ProSeries manual gives specific drain-cap and multiport-valve instructions for that filter family. Do not apply that exact valve position to a different model.
Cartridge Filter
Relieve pressure, open the housing by the manual, remove the cartridge, and clean it. Let the cartridge and housing drain and dry as instructed. The full process is covered in how to clean a pool filter cartridge.
Inspect the cartridge, housing, clamp, air-relief components, and seals. If something is cracked, distorted, or missing, record the model and part number for replacement rather than forcing the system back together.
DE Filter, Salt System, Chlorinator, And Heater
These components need their own manuals. A DE filter may require grid or module cleaning; a salt system may have a cell and control unit; a heater may have several water passages and electrical or gas isolation steps. Do not reduce them to a generic “pull one plug” instruction.
If the equipment has already stopped moving water correctly, use the pool filter not working guide to identify a basic issue, but do not dismantle pressurized or energized equipment to improvise a winter repair.
Step 6: Remove Hoses, Ladder, And Small Parts
Flexible above-ground pool hoses are usually simpler to remove and drain than to treat like buried in-ground plumbing. Disconnect them as the manual directs, empty low spots, dry them, and store them without sharp bends.
Remove and clean:
- Ladder or removable steps
- Vacuum hose and head
- Skimmer basket and removable fittings
- Return attachments
- Solar blanket, toys, thermometer, and floating accessories
- Small clamps, adapters, caps, and drain plugs
Label small parts by location. A photo of the assembled connection can make spring reassembly easier. Store O-rings and gaskets as their manufacturer recommends; do not coat them with an unknown lubricant.
Step 7: Protect The Skimmer, Return, Liner, And Wall
A leave-up pool needs an approved plan for each opening. Depending on the model, that may involve lowering water, installing a specific plug, using a skimmer-protection device, removing a fitting, or another manufacturer-designed method.
Do not hammer in an improvised plug, fill fittings with unapproved antifreeze, or copy an in-ground line-blowing tutorial onto removable above-ground hoses. If your pool has rigid plumbing, buried lines, a deck that blocks access, or nonstandard equipment, hire a qualified pool professional.
Keep the liner supported and check the wall for rust, movement, dents, or loose hardware before covering. A winter cover cannot correct structural damage.
Some owners use an air pillow beneath a floating cover. Treat it as a cover-management accessory only when the pool and cover instructions allow it. It is not a substitute for correct water level, sound walls, proper drainage, or winter inspections.
Step 8: Install And Secure The Winter Cover
Use a cover made for the pool’s size, shape, wall system, and closing method. Inspect it for tears, damaged grommets, worn cable, and sharp contact points before installation.
Install it according to the cover instructions:
- Center it without dragging it across sharp metal.
- Use the specified cable, winch, straps, clips, or anchors.
- Do not overtighten it against the top rails or liner.
- Leave only the amount of slack the cover system requires.
- Keep roof runoff and yard drainage from flooding the cover or washing out the pool base.
A normal floating winter cover is not automatically a safety cover. Maintain the pool barrier and prevent access by children and pets. Never walk onto the cover to remove water, snow, or ice.
Completing how to winterize an above ground pool means matching the cover to the pool, not just stretching a tarp over the opening.
Winter Inspection Checklist
Closing day is the start of winter maintenance, not the end. Inspect the pool after heavy rain, wind, snow, and freeze-thaw cycles.
Check:
- Cover attachment, tension, and visible damage
- Accumulated water, leaves, snow, or ice
- Pool wall movement, corrosion, or leaning
- Liner position and visible water loss
- Skimmer and return protection
- Exposed equipment and storage area
- Drainage around the pool base
- Fence, gate, ladder removal, and unauthorized access
Remove loads only by the cover manufacturer’s method and from a safe position outside the pool. Do not chip ice with a sharp tool or stand on the cover. If the wall shifts, water level falls unexpectedly, or the cover threatens to pull on the structure, contact a qualified pool professional.
How To Store A Seasonal Intex, Bestway, Or Coleman Pool
For many seasonal pools, winterizing means storage rather than covering the filled pool.
Use this sequence only when the exact manual calls for takedown:
- Check local discharge rules and any relevant product-label restrictions before draining.
- Disconnect power and equipment by the manuals.
- Drain through the approved outlet to a permitted location.
- Remove remaining debris and rinse with an approved method.
- Let the liner, frame, hoses, and equipment dry completely.
- Disassemble without forcing stuck frame parts.
- Fold or roll the liner as instructed, avoiding sharp creases and fittings.
- Store everything in a dry, protected place away from rodents, sharp tools, and pool chemicals.
Intex, Bestway, and Coleman names do not guarantee identical instructions. Match the manual to the exact model number. A steel-frame seasonal pool can still require takedown even though the word “steel” appears in its product name; it is not the same structure as a permanent steel-wall pool.
This pool-type check is why a good guide on how to winterize an above ground pool cannot begin with “lower the water” or “add a closing kit.”
Common Winterizing Mistakes
Using One Checklist For Every Pool Type
A portable frame pool, permanent steel-wall pool, and mild-climate installation do not share one closing method. Start with identification.
Completely Draining A Permanent Pool
Leaving a permanent wall and liner empty can create structural and liner problems. Complete draining is not the safe default.
Guessing At The Water Level
The skimmer, return protection, pool design, and cover instructions control the level. A fixed internet number may conflict with your equipment.
Covering Dirty Or Problem Water
Leaves, algae, and sediment do not improve under an opaque cover. Clean and diagnose before closing.
Mixing Or Overusing Closing Products
More product is not automatically more protection. Test first, read labels, and keep concentrates separate.
Leaving Water In Equipment
A small amount trapped in a housing, valve, hose, or fitting can expand when frozen. Drain every component by its manual.
Losing Plugs And Fittings
Keep small parts labeled with the equipment. Do not reinstall drain plugs for winter unless the manual directs it.
Overtightening Or Ignoring The Cover
Too much tension can stress a cover or pool edge, while too little attention lets water and debris accumulate. Install and inspect according to the cover instructions.
Waiting Until Spring To Look Again
Storms, animals, drainage changes, and freeze-thaw cycles can alter the closing setup. Regular visual checks catch problems earlier.
FAQ
Should You Completely Drain An Above-Ground Pool For Winter?
Not as a universal rule. A seasonal pool may need to be drained, dried, and stored if its manual says so. A permanent steel-wall pool usually remains standing with water supporting the structure. Follow the exact pool and liner instructions.
How Much Water Should Be Left In An Above-Ground Pool?
There is no single safe number. The correct level depends on the pool, liner, skimmer and return protection, cover design, and manufacturer instructions. Do not use a generic lowering depth if it conflicts with your system.
Should I Remove The Pump And Filter For Winter?
Many above-ground systems are removable and should be drained and stored as their manuals direct, especially where freezing occurs. Larger permanent equipment may remain installed but still requires complete model-specific drainage and weather protection.
Can An Intex Or Bestway Pool Stay Up All Winter?
Some model instructions call for draining, disassembly, and storage before freezing. Do not decide from the brand name alone. Find the model-specific manual and follow its winter-storage requirement.
Do I Need Winter Chemicals?
It depends on current water testing, pool volume, sanitizer system, local conditions, and the product labels. A closing kit is not automatically required in full, and no product guarantees clear spring water.
What Happens If Water Stays In Pool Hoses?
Trapped water can freeze, expand, and split a hose or damage a fitting. Remove, drain, dry, and store flexible hoses when the model and climate require it.
Can I Keep My Above-Ground Pool Open In A Mild Climate?
Possibly, if the pool and equipment are designed to remain operating and you have a plan for occasional freezes and outages. Follow each equipment manual and local conditions rather than assuming circulation alone prevents all freeze damage.