Swimming Pool Closing in Minnesota -- When and How to Do It Right

Swimming Pool Closing In Minnesota Whens The Best Time To Do It
Posted on: 1/16/2025

As a Minnesota homeowner with an in-ground pool, knowing the ideal time to winterize your pool is essential. Closing your pool properly and at the right time protects your investment from freezing damage, preserves its beauty, and ensures hassle-free reopening in the spring.

Curious about when to start your pool winterization? Here's everything you need to know to close your pool with confidence.

Why Timing Matters for Pool Closing

Properly timing your pool closure can prevent costly damage and make reopening easier. Minnesota's harsh winters mean that freezing temperatures can wreak havoc on your pool's plumbing, equipment, and overall structure. By planning your winterization, you'll ensure long-lasting performance and peace of mind.

Key Factors to Consider for Pool Closing

1. Pool Heater Use

  • Most residential pool owners close their pools by the third Saturday in September, known as National Pool Closing Day.
  • Heated pools, however, can extend the swimming season by up to three weeks beyond this date. If you enjoy swimming later in the year, a pool heater makes it possible.

2. Outdoor Temperatures

  • Freezing temperatures pose a significant threat to your pool. Once temperatures consistently dip below 65°F, it's time to begin winterizing.
  • Allowing water to freeze in your plumbing can lead to cracked pipes, pump damage, and filter issues.
  • Follow your robotic pool cleaner's instructions to avoid cold-related damage, but remember: its removal may happen before the full pool winterization begins.

3. Falling Leaves

  • If your yard has deciduous trees, autumn leaves can create a mess in your pool. Closing your pool early---or using a retractable pool cover---can save you from daily cleaning hassles.
  • Keeping your pool covered during fall minimizes maintenance and preserves water quality.

Steps to Properly Close Your Pool

Closing your pool involves more than just covering it up. Follow these essential steps to ensure your pool is ready for winter:

  1. Remove Accessories
  • Detach, clean, and store items like skimmer baskets, ladders, diving boards, and return fittings.
  1. Clean the Pool
  • Test and balance the water's pH, total alkalinity, calcium hardness, and chlorine levels. Ensure the pool is spotless before closing.
  1. Lower the Water Level
  • Drain water to about two to three inches below the skimmer to prevent freezing damage.
  1. Shock the Water
  • Add pool shock to prevent algae and organic contaminants from growing over winter.
  1. Remove Equipment
  • Detach, clean, and store the filter, pump, chlorinator, and hoses. Remove plugs from equipment if applicable.
  1. Blow Out the Plumbing Lines
  • Use a high-powered vacuum to remove water from the lines and insert plugs for protection.
  1. Cover the Pool
  • Secure your winter pool cover to keep debris out and protect the water. For ease and maximum protection, consider installing an automatic retractable cover.

Schedule Your Pool Closing Today!

Don't let Minnesota's harsh winter damage your pool. Let Royal Pool & Spa take care of your pool closing so you can enjoy a worry-free spring reopening. Call us today at 651-779-7606 or contact us online to schedule your professional pool winterization. We're here to make pool ownership as easy and enjoyable as possible!