How Do I Remove Water From a Pool Cover?

Let's break it down: removing water from a pool cover is usually straightforward, but the right method depends heavily on the type of cover you have. A solid winter or safety cover can collect a surprising amount of rain and melted snow, while a mesh cover is designed to let water pass through rather than form a large puddle. Taking a few minutes to identify the cover, clear debris, and remove the water gradually can make the job safer and reduce the chance of damaging the cover or dumping dirty water into the pool.

Why Water on a Pool Cover Should Be Removed

Water is heavy. One gallon weighs a little more than 8 pounds, which means even a shallow-looking puddle spread across a large cover can add hundreds of pounds of load. On a solid winter cover, that weight can pull at water bags, cable systems, anchors, springs, seams, or attachment points.

Standing water also traps leaves and organic debris. Given enough time, that mixture can turn into a dirty layer that is much harder to handle when you open the pool. In freezing climates, pooled water may repeatedly freeze and thaw, adding another source of stress.

There is also a practical safety issue. A large puddle can hide the surface underneath and make a covered pool look deceptively similar to shallow standing water on solid ground. Keep children and pets away from the covered pool, and never walk onto a pool cover just to position a pump unless the cover manufacturer specifically provides a safe procedure for doing so.

First, Determine What Kind of Cover You Have

The correct approach is different for solid and mesh covers.

• Solid winter cover: Rain and snowmelt normally stay on top, so water usually needs to be pumped away.
• Solid safety cover: A fully solid version may require a cover pump. Some solid safety covers have a mesh drain panel that allows water to pass through.
• Mesh safety cover: Water is intended to drain through the fabric. Leaves and larger debris generally remain above the pool.
• Automatic pool cover: Standing water should normally be removed before operating the cover because the added weight can strain the cover and drive system.

If you are unsure which type you have, look for whether water readily passes through the material and check the manufacturer's care instructions before using equipment on it.

How to Pump Water Off a Solid Pool Cover

Start by removing as many leaves, twigs, and other loose materials as you reasonably can from the surrounding cover surface. A pool leaf rake or soft broom can help, but avoid sharp tools that could puncture or abrade the material.

Next, place a cover pump in the lowest area of the accumulated water according to the pump and cover manufacturer's directions. Automatic cover pumps can switch on as water accumulates, while manual pumps require you to monitor them.

Route the discharge hose somewhere the water can drain without flowing back toward the pool, undermining the deck, flooding landscaping, or creating an icy walking surface in cold weather. Then let the pump remove the water steadily.

As the water level falls, leaves may collect around the pump intake. Check it periodically and clear obstructions with the equipment turned off. A clogged intake can dramatically slow pumping and may cause some pumps to run improperly.

Do Not Drain Every Last Drop Before Removing Debris

One useful trick is to work in stages when the cover contains both water and a thick layer of leaves. Pump away enough water to make the debris manageable, remove the leaves, and then continue pumping.

If you immediately pump nearly all of the water from underneath a heavy mass of wet leaves, the debris can settle tightly against the cover. That makes cleanup harder and can concentrate weight in one area. Removing some debris during the process is often easier on both you and the cover.

What If Water Keeps Collecting in the Same Spot?

A recurring puddle does not automatically mean something is wrong. Flexible solid covers naturally develop low areas where rainwater collects. However, an unusually deep pocket deserves a closer look.

On an anchored safety cover, inspect the springs, straps, anchors, and overall tension from the deck. A loose or uneven section may sag more than intended. On a tarp-style winter cover, check whether water bags, cables, or other restraints have shifted.

Do not simply tighten an unfamiliar safety-cover system as much as possible. Excessive or uneven tension can create its own problems. Follow the cover manufacturer's adjustment procedure or have a pool professional inspect it if the installation looks distorted.

What About Water on a Mesh Pool Cover?

A true mesh cover generally should not hold a large, long-lasting puddle because rain and snowmelt are designed to pass through it. Some moisture sitting temporarily on top can be normal, especially during very heavy rainfall, but persistent pooling deserves investigation.

Leaves, pollen, fine debris, or algae-like organic buildup can restrict drainage through the mesh. Carefully removing the accumulated debris may restore normal drainage. A sagging section can also create a temporary basin faster than water can pass through.

Remember that water draining through a mesh cover enters the swimming pool. During a rainy winter or rapid snowmelt, the pool level itself can therefore rise even though the top of the cover looks relatively dry.

Be Careful When Opening the Pool

Trying to remove a solid cover while water is still sitting on it is one of the easiest ways to dump leaves, mud, and stagnant water directly into an otherwise protected pool. It can also make the cover extremely difficult to handle.

Pump off the standing water first. Remove the remaining debris. Then clean or rinse the cover as appropriate before folding or storing it. Allowing the cover to dry before long-term storage can also reduce odors and organic buildup.

Check the Pool's Water Level Too

When maintaining a winter cover, it is worth occasionally looking at the actual pool level as well. A mesh cover can allow precipitation into the pool, causing the level to rise. With other setups, unexplained water loss beneath the cover can be harder to notice because you are not looking at the pool every day.

If the pool level appears to be dropping for reasons that are difficult to explain, a Mini Bucket Test can be a useful first step once conditions allow you to perform an evaporation comparison properly. It can help you compare normal evaporation with possible leak-related water loss, but it does not prove that a leak exists or identify where a leak may be located.

When to Call a Pool Professional

Professional help makes sense if the cover has torn material, damaged anchors, stretched straps, broken springs, severe sagging, or a large accumulation that you cannot safely reach from the deck. The same applies if an automatic cover stops moving normally after being subjected to standing water.

For winterized pools, avoid disconnecting plugs, opening plumbing, or changing the pool level substantially just because you see a cover problem. Winterization procedures vary by pool, climate, equipment layout, and cover design.

The Bottom Line

For most solid pool covers, a proper cover pump is the simplest way to remove accumulated rainwater or snowmelt. Clear heavy debris, pump the water gradually, keep the discharge away from the pool, and avoid moving the cover until most of the load is gone. Mesh covers usually manage rainfall differently by allowing water to drain through, so a persistent puddle on mesh calls for checking debris buildup and cover tension rather than automatically treating it like a solid cover.

A little maintenance after storms can prevent one enormous, messy job later. More importantly, keeping the cover working the way it was designed helps protect the cover, the pool, and the people around it.