How to Winterize Your Pool in Northern New Jersey: Expert Tips

Have you thought about closing your pool for the winter yet? If you’re in Northern New Jersey, now’s the time to get on it. Once the freezing temperatures hit, things like snow and ice can cause real damage to your pool equipment and structure if it’s not properly shut down. Trust us—it’s better to winterize now than to deal with intense repairs in the spring.

Winter is coming. Do you know how to protect your pool?

At Mufson Pools: Landscape & Design, we’ve spent over 30 years helping homeowners in Bergen, Morris, and Essex Counties safely close their pools before the cold sets in. In this guide, we’ll explain everything you need to know about winterizing your pool in New Jersey—including the best time to do it, which chemicals you’ll need, step-by-step instructions, and why hiring a professional can save you time, stress, and costly repairs.

Why Pool Winterization Is Critical in New Jersey

New Jersey winters can be harsh, with sudden cold snaps, early snowstorms, and frequent freezing temperatures. Without proper winterization, your pool is at risk for:

• Frozen plumbing and cracked lines
• Damage to pumps, filters, and heaters
• Algae growth under the cover
• Scaling, staining, or liner damage

According to the Pool & Hot Tub Alliance, closing your pool properly is one of the most important steps you can take to protect your investment and reduce maintenance costs in the spring.

When to Winterize Your Pool in NJ

Start winterizing your pool when the water temperature drops below 65°F. In Northern New Jersey, this typically happens in late September to mid-October. Winterizing too early can lead to algae growth, and winterizing too late can result in frozen pipes and equipment.

You can monitor pool temperature using a floating or digital thermometer. Learn more from Swim University’s pool temperature guide.

Step-by-Step Pool Winterization Checklist

Here is a general overview of the pool winterization process. For best results, consider scheduling a professional pool closing with Mufson Pools.

1. Balance Pool Water

Water chemistry should be adjusted before closing the pool to prevent corrosion, scale, and algae growth. Recommended Winter Chemical Levels:

• pH: 7.2–7.6
• Alkalinity: 80–120 ppm
• Calcium Hardness: 180–220 ppm
• Chlorine: 1–3 ppm

The CDC recommends regular testing to ensure safety and sanitation.

2. Shock the Pool

Apply a chlorine-based shock to eliminate bacteria and organic contaminants. This should be done 24 to 48 hours before closing, with the pump running for proper circulation.

Need guidance? Refer to Swim University’s pool shock tutorial.

3. Clean the Pool Thoroughly

Before closing, remove all debris to avoid staining and contamination:

• Skim the surface
• Vacuum the floor
• Brush the walls and tile
• Clean skimmer and pump baskets

4. Lower the Water Level

The water level should be lowered below the skimmer opening to prevent freeze damage. Be careful not to go too low if you have a vinyl liner.

See In The Swim’s guide for water level recommendations based on pool type.

5. Drain and Blow Out Pool Lines

All plumbing lines must be drained and blown out using a shop vac or air compressor. This step helps prevent water from freezing and cracking the lines.

• Blow out return lines, skimmers, and main drain
• Plug each line with a winterizing plug

This step is best handled by a professional, as incomplete drainage is a major cause of freeze damage. See The Spruce’s pool closing guide for more details.

6. Add Winterizing Chemicals

Use a winter closing kit that includes:

• Non-chlorine shock
• Algaecide
• Stain and scale preventer

These products help maintain water quality and prevent algae blooms during the off-season. For product suggestions, visit Leslie’s Pool Closing Tips.

7. Install a Pool Cover

A safety or solid pool cover keeps debris out and blocks sunlight that promotes algae growth. Make sure the cover is secured tightly and that water bags or straps are properly fastened.

According to the U.S. Consumer Product Safety Commission, safety covers also help prevent accidental drowning and should be part of any pool owner’s winter strategy.

Explore custom pool covers from Mufson Pools.

Why Choose Mufson Pools for Winterization

At Mufson Pools, we provide full-service pool winterization across Northern New Jersey. Our trained professionals ensure that every component of your pool is properly shut down and protected for the winter. Our winterization services include:

• Equipment inspection and drainage
• Chemical balancing and treatment
• Line blowing and plug installation
• Cover installation and securing

We also offer year-round pool maintenance, hardscape design, and landscape architecture services to help you enjoy your backyard all year long.

Winter Pool Care Tips

1. Check your pool cover after storms to remove heavy snow or debris
2. Monitor the water level and cover tension
3. Inspect your cover straps and anchors periodically
4. Schedule your spring pool opening early to avoid delays

Schedule Your Pool Winterization Today

Avoid expensive repairs and protect your pool this winter with help from Mufson Pools: Landscape & Design. Our experienced team is ready to ensure your pool is winter-ready and worry-free.

Protect your pool and avoid costly repairs this winter with help from Mufson Pools: Landscape & Design. Our expert team will ensure your pool is safely closed for the season—so you can relax knowing it’s in good hands.

Getting started is easy:

• Contact us: Call or fill out our online form to schedule your service.
• Pick a date: Choose a time that works for you—early booking means better availability.
• We handle the rest: From chemical balancing to line blowing and covering, we take care of it all.

Don’t wait for the first freeze. Book your winterization service today and enjoy a worry-free off-season.