Preparing your above ground pool for winter protects equipment and extends its life through freezing temperatures. This guide walks you through the essential steps to close your pool safely and keep everything in good condition until spring.
Following a consistent sequence reduces the risk of damage from ice, freezing water, and debris. Use this structured approach to close your above ground pool with confidence.
| Phase | Key Action | Timing | Tools Needed |
|---|---|---|---|
| Preparation | Balance water and clean surfaces | 1–2 weeks before closing | Test kit, skimmer net |
| Equipment Protection | Drain pumps, cover pipes, store accessories | Just before water removal | Air compressor, plugs |
| Water Removal & Winterizing | Lower water, add winterizing chemicals, blow lines | One week before final cover | Winterizing kit, submersible pump |
| Final Cover & Securing | Install cover, anchor tightly, check for tears | When water is below top rail | Cover, winch tool, straps |
Test and Balance Pool Water Before Closing
Proper water balance prevents staining, scaling, and corrosion during winter storage. Test your water at least one week before you plan to close the pool.
Key Chemistry Targets
Adjust pH to between 7.2 and 7.6, total alkalinity to 80–120 ppm, and calcium hardness to around 175–225 ppm for vinyl pools. Keep free chlorine at 1–3 ppm before adding a winter algaecide.
Drain and Protect Pool Equipment
Removing water from pumps, filters, and pipes prevents freezing and costly repairs. Complete this step on a dry day with all equipment turned off and unplugged.
Plumbing and Component Care
Disconnect hoses, remove ladders, and store them in a dry place. Use an air compressor to blow water out of the lines, then plug returns and skimmers with winter plugs.
Winterizing Chemicals and Water Level Management
Adding the correct chemicals and lowering the water protects surfaces and equipment during months of dormancy. Perform this phase about one week before you secure the cover.
Chemical Application and Water Removal
Add a quality winterizing algaecide and shock treatment, then run the pump for circulation. Use a submersible pump or siphon to lower the water level 4–6 inches below the top of the pool wall.
Cover Installation and Final Inspection
A tight, clean cover is the last defense against debris, rain, and freezing temperatures. Inspect the cover for any damage before placing it on the pool.
Securing the Cover
Center the cover, remove wrinkles, and attach winch straps or anchors every few feet. Place cover boards or rails on top for extra stability in windy conditions.
Off-Season Maintenance and Monitoring
Periodic checks during the off-season help identify problems early and reduce spring cleanup time. Cold weather and moisture can still affect the pool area even after a successful close.
What to Watch For
Check the cover weekly for standing water, tears, or loose anchors. Clear snow from the top when safe, and avoid sharp objects that could puncture the liner.
Key Takeaways for Winter Pool Closure
- Balance water chemistry at least one week before covering
- Drain and protect pumps, filters, and exposed pipes from freezing
- Use winterizing algaecide and lower water level below the top rail
- Install a clean, tight cover and anchor it securely
- Inspect the pool periodically during the off-season for damage or standing water
FAQ
Reader questions
How do I know when it is time to close my above ground pool for winter?
Close the pool when daytime temperatures consistently stay below 65°F (18°C), usually several weeks before the first expected hard frost in your region.
Can I close my above ground pool with a variable water level system?
Yes, set the system to the recommended winter level or manually lower the water 4–6 inches below the top rail to protect the liner and walls.
Do I need to remove the above ground pool ladder during winter?
Yes, remove and store the ladder to prevent ice buildup, reduce stress on mounting points, and keep the attachment points cleaner for spring.
Should I turn off the power completely or leave the timer running during winter months?
Turn off the power at the circuit breaker and unplug any equipment to prevent accidental activation or damage from power surges while the pool is closed.