Is My Pool Losing Water Because of Summer Heat or Do I Have a Leak?

Every summer, pool owners ask the same question:

“It’s been extremely hot lately. Is my pool losing water because of evaporation, or do I actually have a leak?”

And it’s a good question!

Summer brings higher temperatures, stronger sunlight, increased pool usage, and more evaporation. At the same time, summer is also one of the busiest seasons for pool leak detection because many homeowners discover water loss that goes beyond what normal evaporation can explain.

The challenge is determining which one you’re dealing with.

Understanding the difference between normal evaporation and an actual leak can help you avoid unnecessary worry while also preventing a small leak from becoming a larger problem.

Yes, Pools Naturally Lose Water During Summer

Most swimming pools lose water due to evaporation.

When temperatures rise and the sun beats down on the water’s surface, evaporation increases naturally. Factors that contribute to summer water loss include:

• High air temperatures
• Direct sunlight
• Wind
• Low humidity
• Heated pool water
• Increased pool usage

During particularly hot stretches of weather, some water loss is expected.

In most cases, pools may lose approximately 1/8″ to 1/4″ of water per day due to evaporation alone.

However, if you’re consistently adding water every few days or noticing significant water loss week after week, it’s worth taking a closer look.

When Summer Water Loss May Indicate a Leak

The biggest mistake homeowners make is assuming all summer water loss is caused by evaporation.

While hot weather certainly increases evaporation, leaks are extremely common during the summer months and often go unnoticed because homeowners attribute the problem to the heat.

Water loss may indicate a leak if:

• You’re adding water more than once per week
• Water loss exceeds normal evaporation rates
• Air bubbles are visible from return jets
• The pump struggles to maintain prime
• Wet or soggy areas develop around the pool
• Water levels consistently drop to the same point

If you’re experiencing any of these symptoms, review the most common signs your pool may have a leak for a more detailed breakdown.

Why Summer Is a Common Time for Leak Discovery

Many homeowners assume that summer causes leaks.

In reality, summer doesn’t necessarily create the leak, it simply makes it easier to notice.

During peak swimming season:

• Pools are used more frequently
• Water levels are monitored more closely
• Evaporation becomes a convenient explanation
• Water bills become more noticeable

As a result, leaks that may have existed for months often become obvious during the hottest part of the year.

We routinely receive calls from homeowners who assumed they were dealing with evaporation, only to discover an active leak after proper testing.

A Simple Way to Compare Leak vs. Evaporation

One of the easiest ways to gather information is by performing a bucket test.

The bucket test compares water loss inside a bucket to water loss in the pool over the same time period.

If the pool loses more water than the bucket, a leak may be present.

However, while the bucket test can indicate whether a leak exists, it cannot tell you:

• Where the leak is located
• Whether the leak is structural or plumbing-related
• How severe the leak may be

For a more complete explanation of water loss testing, visit our guide on pool leak or evaporation.

Common Pool Leaks We Find During Summer

Summer is when many hidden leaks finally get discovered.

Some of the most common leak sources include:

Underground Plumbing Leaks

Leaks in return lines, skimmer lines, and main drain lines often occur underground where they cannot be seen.

Pool Light Leaks

Water can escape through light conduits and pool light niches without producing obvious visible symptoms.

Vinyl Liner Leaks

Small punctures, tears, and seam separations can cause steady water loss throughout the season.

Skimmer Leaks

Cracks around skimmers and skimmer throats are common leak locations, particularly in older pools.

Return Fitting Leaks

Wall fittings and return penetrations can deteriorate over time and allow water to escape.

Many of these issues cannot be confirmed through visual inspection alone and often require specialized leak detection methods.

Don’t Assume It’s Just the Heat

One of the most expensive mistakes pool owners make is ignoring ongoing water loss because they believe summer weather is solely responsible.

If your pool is losing more water than expected, it’s important to investigate the cause rather than continuously adding water.

A leak that goes undetected can lead to:

• Increased water bills
• Higher chemical costs
• Soil erosion
• Equipment strain
• More expensive repairs later

Accurate diagnosis is always less expensive than guessing.

If you’re unsure whether your pool is leaking, our comprehensive Pool Leak Guide explains how professionals identify and diagnose pool leaks.

When Should You Call a Pool Leak Detection Professional?

Professional leak detection may be appropriate if:

• Water loss exceeds normal evaporation
• You’re adding water frequently
• The bucket test suggests a leak
• The source of water loss is unclear
• Previous repairs haven’t solved the issue

Professional testing can determine whether the problem is structural, plumbing-related, or simply normal evaporation.

The sooner the issue is identified, the easier it is to address correctly.

Need Help Determining Whether Your Pool Is Leaking?

Summer heat can cause evaporation, but it can also hide the warning signs of an active leak.

If your pool is losing more water than expected and you’re tired of guessing, Atlantic Pool Leak Detection can help.

We specialize in accurately identifying swimming pool leaks using professional diagnostic methods throughout New Jersey and Staten Island.

Stop losing water. Call Atlantic Pool Leak Detection today at 732-333-3304 or contact us to schedule professional leak detection services.

FAQ

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