If you own a backyard pool in Wisconsin, you know that winter can do a real number on your investment. Between hard freezes, heavy snow, and wind-blown debris, skipping proper winterization is a recipe for costly repairs come spring. The good news? With some practical steps and a little elbow grease, you can protect your pool from the harshest Wisconsin winters. Here’s a straightforward, step-by-step guide to getting your pool buttoned up before the snow flies.
Inspect and Clean Your Pool Thoroughly Before Closing
Start by giving your pool a thorough inspection. Check the pool liner for any tears, cracks, or weak points—these small issues will only get worse over the winter months. Take a close look at tile, coping, and steps for signs of damage. Get any repairs done now to avoid leaks or structural problems when you reopen in spring.
Once your inspection is complete, give your pool a deep clean. Skim out all leaves, twigs, and debris. Use a pool vacuum to clean the bottom, and brush the walls and steps to remove algae or stubborn dirt. Don’t forget to empty and clean the skimmer and pump baskets. The cleaner your pool is at closing, the easier your spring opening will be.
Balance Water Chemistry and Lower the Water Level
Balancing your pool’s water chemistry is crucial for winter protection. Test and adjust pH, alkalinity, and calcium hardness so they’re all within recommended ranges—this helps prevent staining, scaling, and corrosion during the off season. Add a winterizing chemical kit that includes a shock treatment and algaecide to keep the water clear and free from bacteria while it sits.
Lower the water level in the pool to below the skimmer opening but not so low that it exposes the liner or causes it to shrink. For most in-ground pools in Wisconsin, this means draining to about 4–6 inches below the skimmer. This gives room for expansion if the water freezes, reducing the risk of damage to tile and skimmers. Just be careful not to over-drain, especially if you have a vinyl liner.
Winterize Pool Equipment and Remove Accessories
Now it’s time to take care of your pool equipment. Start by backwashing and draining your filter system—whether it’s sand, cartridge, or DE. Remove all drain plugs from pumps, filters, and heaters so water can escape and doesn’t freeze inside the equipment, which could cause cracking. Store the plugs somewhere safe so you can find them in spring.
Don’t forget about hoses, ladders, diving boards, toys, and any other accessories. Remove and clean everything before storing it in a dry, sheltered spot like your garage or shed. For pools with automatic cleaners or solar covers, be sure to clean and store those too. Leaving accessories out in the elements all winter is a surefire way to shorten their lifespan.
Cover Your Pool Securely to Prevent Winter Damage
A sturdy winter pool cover is your pool’s first line of defense against Wisconsin’s snow and ice. Choose a cover that fits your pool snugly, with no gaps around the edges. Use water bags, cover clips, or a cable and winch system to keep the cover anchored down. If you have an above-ground pool, make sure the air pillow is centered under the cover to help absorb ice expansion.
Check the cover periodically through the winter to clear off heavy snow or standing water. Use a cover pump or broom, but never walk on the cover—even if it looks solid. Keeping the cover tight and free from excess weight will help prevent rips, sagging, and debris getting into your pool.
Taking the time to properly winterize your pool saves hassle, money, and headaches when warm weather returns to Wisconsin. With these simple steps, you’ll protect your investment and ensure your pool is ready for another season of fun. If you ever need a hand or have questions about your specific setup, don’t hesitate to reach out to a trusted local pool professional. Stay warm and see you in the spring!
