How to Close Your Pool for Winter

When the temperatures start to dip, your pool deserves a little TLC before going into hibernation. Closing your pool properly doesn’t just keep it safe from winter damage—it also makes spring opening smooth and stress-free. With the right prep and a few essentials from WATER TRENDS, you can protect your investment and look forward to crystal-clear water next season.

Step-by-Step Guide to Closing Your Pool

1. Balance your water chemistry.

• Test your water and adjust pH, alkalinity, and calcium hardness.

• Add a shock treatment and sanitizer to prevent algae growth.

2. Clean the pool thoroughly.

• Skim out leaves and debris.

• Brush the walls and vacuum the bottom.

• A clean pool now means less work later.

3. Lower the water level.

• For most pools, drain water below the skimmer and return lines.

• How far you lower it depends on your pool type and cover—our in-store experts can guide you.

4. Drain and prepare your equipment.

• Empty water from pumps, heaters, and filters.

• Remove drain plugs and store them safely.

• Store accessories like ladders and floats in a dry place.

5. Add winterizing chemicals.

• Algaecide and pool shock keep your pool protected.

• Look for WATER TRENDS winter closing kits to simplify this step.

6. Protect plumbing lines.

• Blow out lines with a shop vac or air compressor.

• Allow hoses and equipment to dry thoroughly before storing.

7. Install plugs and pillows.

• Thread in winter plugs to prevent water from entering return lines.

• Place a pillow to absorb expansion if water freezes.

8. Cover your pool securely.

• Choose a strong winter cover or a safety cover for added protection.

• Tighten cord winch or anchors so wind and snow don’t cause shifting.

FAQs About Pool Winter Closing

Q: Can I leave water in my pool during winter?
Yes. In fact, you should never fully drain an in-ground pool, as water helps keep the structure stable. The key is lowering it to the right level.

Q: How far down should I lower the water level?
Generally, 4–6 inches below the skimmer for mesh covers, or just below return lines for solid covers. Always follow your pool manufacturer’s guidelines.

Q: Do I really need winterizing chemicals?
Absolutely. Skipping this step often leads to green, cloudy water and stains in spring. A winter kit is an easy, all-in-one solution.

Q: What’s the difference between a winter cover and a safety cover?
Winter covers protect your water from debris, while safety covers are anchored and provide added security for families and pets.

Ready to Close With Confidence?

WATER TRENDS has everything you need for winter closing—from chemical kits and plugs to durable safety covers. Plus, we have a YouTube playlist with video tutorials to guide you every step of the way! Visit us online or your local Great Escape store if you're in the Midwest and let our experts help you protect your pool so you can dive back in with ease come spring.