How to Protect Your Pool Through Storm Season

For homeowners in storm-prone regions, severe weather is not an if but a when, and a swimming pool is very much part of what has to be prepared. The encouraging news is that a pool, handled correctly, is remarkably resilient. A pool that is prepared properly before a storm and tended to promptly afterward almost always comes through clean, intact, and swim-ready within days. A pool that is neglected, or worse, mishandled out of good intentions, can turn green, suffer real equipment damage, or become a genuine hazard.

The single biggest mistake: draining the pool

Before any checklist, the most important storm-season lesson deserves its own section, because it is the mistake well-meaning homeowners most often make. When a serious storm is forecast, the instinct of many owners is to drain the pool, or partially drain it, on the logic that an empty pool cannot overflow and a lower level leaves room for rain. It feels prudent. It is, in fact, one of the worst things you can do.

Two forces make a drained pool dangerous in a storm. The first is the structure itself: an interior finish is meant to stay wet, and a pool standing empty is more vulnerable, not less. The second, and the dramatic one, is ground water. Heavy storm rain saturates the soil and raises the water table, and the pressure of that ground water pushes up on the pool shell from below. The weight of a full pool of water is what holds the shell down against that pressure. Drain the pool, remove that weight, and in saturated ground an empty pool can actually be lifted, shifted, or floated out of position, a catastrophic and enormously expensive failure.

Before the storm

With that established, here is what to actually do in the day or two before a storm is expected to arrive.

• Leave the water in the pool. As above, do not drain or lower it. A full pool is a protected pool.
• Balance and lightly over-treat the water. Bring the chemistry into balance and add a little extra sanitizer, so the water has reserve capacity to absorb the dilution and the organic load a storm brings.
• Do not cover the pool. It is tempting, but wind-driven branches and debris can tear, damage, and badly tangle a cover. An uncovered pool is easier and cheaper to clean out afterward than a damaged cover is to replace.
• Secure or stow everything loose. Furniture, loungers, toys, planters, cleaning equipment, and decor can all become wind-borne projectiles. Bring them indoors or into a garage. Items that genuinely cannot be moved can, as a last resort, be placed in the pool, where the water keeps them from flying.
• Protect the equipment pad. Turn off the pool equipment at the breaker, and if flooding or a storm surge is a risk and time allows, wrap or shelter the pump, motor, and control components to guard against water and electrical damage.

None of this takes long, and done together it is the difference between a pool that shrugs off a storm and one that becomes a project. The goal is simple: a full pool, balanced water with some reserve, a clear deck, and protected equipment.

During the storm: do nothing

This is the easiest section to follow and the most important to respect. Once a storm has arrived, leave the pool entirely alone. Stay away from the water, and stay well away from the equipment pad. A pool during a storm is surrounded by exactly the conditions, standing water, wind-driven debris, and the potential for electrical hazards, that make it dangerous to approach.

There is genuinely nothing useful to be done mid-storm. The preparation was done beforehand; the recovery comes afterward. Any urge to go out and check on the pool, skim debris, or adjust something is an urge to put yourself in danger for no benefit. The pool can take care of itself for the duration. Your job during the storm is to stay safe inside and let it pass.

After the storm

Once the storm has passed and conditions are genuinely safe, the recovery begins. Acting reasonably promptly matters, because storm-stressed water left too long is exactly how a pool turns green.

• Remove large debris first. Skim and lift out branches, leaves, and larger debris before they sink, stain the finish, or clog the skimmer and pump.
• Restore power only when it is safe. Return power to the equipment only once everything is confirmed safe and dry. If there is any doubt about water reaching electrical components, have it checked before energizing anything.
• Rebalance the chemistry. Heavy rain will have diluted and unbalanced the water significantly. Test the full set of values, rebalance, and shock the pool to handle the contamination a storm introduces.
• Run the filter hard, and clean it often. The filter will be doing heavy work clearing storm debris from the water. Run circulation aggressively and clean the filter repeatedly as it loads up.
• Watch for algae over the following days. Storm-stressed water is vulnerable. Keep an eye on clarity and color for several days and treat at the very first hint of algae rather than waiting.

For most pools, following these steps brings the water back to clear and balanced within a few days. The pool was prepared, the storm passed, and a methodical recovery does the rest.

Power outages and your pool

One storm consequence deserves its own attention, because it is the one most likely to turn a well-prepared pool green: the power outage. When the electricity goes out, the pump stops, and when the pump stops, the water stops circulating and filtering. Still, warm water in the aftermath of a storm, carrying all the organic load a storm washed into it, is close to ideal conditions for an algae bloom. An outage of a day or two is usually manageable; an outage stretching longer is where the real risk builds.

There is not a great deal you can safely do about circulation during an outage itself, and you should never run pool equipment off an improvised or unsafe power source. What you can do is act decisively the moment power returns: get the pump running again immediately, test and rebalance the chemistry, add sanitizer to make up for everything that was consumed or burned off while the water sat still, and run the filter hard. The faster circulation and sanitation are restored after an outage, the less chance algae has to establish. If an extended outage has already pushed the pool toward green, that is not a failure on your part, it is simply what still water and storm conditions do, and it is fully recoverable.

When a pool turns green

Sometimes, despite good preparation, a pool turns green after a storm, especially if the storm was severe, if a power outage stopped circulation for an extended period, or if the recovery could not begin promptly. If that happens, do not panic and, again, do not drain the pool. A green pool is a recoverable pool.

WETYR Pools offers green-to-clean recovery for exactly this situation. We assess the pool and its equipment, clear the algae through proper treatment and aggressive filtration, brush and vacuum the surfaces, and rebalance the water to a safe, swim-ready state. We also confirm the pump and filter came through the storm intact and flag any storm-related equipment repairs the pool needs. Once recovered, a pool can be kept clear and protected with an ongoing maintenance plan, so it is ready for whatever the next storm season brings.

Frequently asked questions