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Writer's pictureTovah Coats

Preparing Your Pool for Cooler Weather: A Step-by-Step Guide

Updated: Oct 27


As the cooler months approach, it's time to think about preparing your pool for the changing weather. Proper pool maintenance and preparation can extend its lifespan, protect your investment, and ensure that when warmer weather returns, your pool is ready for enjoyment with minimal hassle. Here’s a step-by-step guide from Triangle Swimming Pools to help you keep your pool in top shape during the off-season.


Step 1: Clean Your Pool Thoroughly

Before you begin the closing process, make sure your pool is as clean as possible. Skim the water’s surface, scrub the walls and floor, and vacuum up any debris. This will help prevent algae growth and make it easier to reopen in the spring. Pay extra attention to removing any dirt or debris that could clog filters or stain pool surfaces over time.


Step 2: Balance the Water Chemistry

Testing and balancing the pool water’s pH, alkalinity, and calcium hardness is essential before closing it down. Adjust the levels as needed, ideally targeting a pH of 7.4-7.6 and an alkalinity level between 100 and 150 ppm. Balanced water helps prevent scaling, staining, and corrosion during the cooler months and provides a fresh start in spring.


Step 3: Shock the Water

Adding a chlorine shock treatment or algaecide helps ensure that the pool water remains clean and algae-free while it’s not in use. Shock treatments are highly concentrated chemicals that kill bacteria and control algae growth, keeping your pool safe and clean even during downtime. Be sure to use the correct dosage based on your pool’s volume, and allow the chlorine levels to return to a safe range before covering the pool.


Step 4: Go With The Flow

While some pools may require complete draining, most do not. With North Carolina moderate temperatures, we recommend keeping the water moving at a low rate. If you’re unsure about the specific steps for cleaning, check with In The Swim (www.intheswim.com), for guidance specific to your pool type and regional weather conditions.


Step 5: Drain and Store Pool Equipment

We do not get much freezing weather, but if expecting freezing temperatures, be sure to drain all pool equipment, such as pumps, filters, heaters, and chlorinators, as any remaining water can freeze, expand, and cause damage. Detach hoses and allow any residual water to drain out. Store accessories like ladders, skimmers, and diving boards in a dry, safe place to avoid unnecessary wear and tear during the off-season.


Step 6: Use a High-Quality Pool Cover

Investing in a high-quality pool cover is one of the best ways to protect your pool from debris, temperature changes, and potential hazards during the cooler months. Choose a cover that fits securely over your pool, providing a tight seal to keep out leaves, dirt, and pests. Safety covers are also available and add an extra layer of protection if you have children or pets.


Step 7: Continue Routine Checks

Even during the off-season, it's wise to periodically check your pool to ensure the cover remains intact, the water level is stable, and no debris has accumulated on the cover. Monthly inspections can prevent small issues from turning into larger, costly repairs when it's time to reopen.



Preparing your pool for cooler weather can be a straightforward process, but it’s crucial to do it right. If you’re pool has been previously damaged and you are considering replacement, our experts can handle preparing you for when warmer weather returns.

With the right preparation, your pool can stay safe and secure through the cooler months, protecting your investment and making reopening a breeze. By following these steps, you’ll be well on your way to a healthy, well-maintained pool year-round.


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