Hurricane Season Pool Prep — Notes From a Port St Joe Backyard

One homeowner's real notes on our saltwater pool in Windmark Beach, Port St Joe, FL. Updated August 31, 2026.

We're on the coast in Port St Joe, Florida, and hurricane season here runs June through November — which means late August and September are usually the busiest stretch. This isn't professional advice; it's what we actually do to our own 12,500-gallon saltwater pool (Bella Vita, Hayward AquaRite salt system) before a storm, plus some real numbers pulled from our own logged water tests that explain why.

What we actually do before a storm

1. We do not drain the pool. Lowering the level by more than about 12 inches risks the shell floating out of the ground once the surrounding soil saturates — the water sitting in the pool is what holds it down. If heavy rain is forecast, we'll lower it a few inches at most, and only through the filter's Waste setting.
2. We shock the pool ahead of time. Once the power's out, the salt cell stops producing chlorine and storm debris adds an organic load right when nothing is treating the water.
3. We shut off power to the pump, heater, and AquaRite at the breaker, and shut off gas at the heater.
4. Loose items come inside — the robot cleaner, test kit, chemicals, deck furniture. Anything left out becomes a projectile in high wind.
5. We leave the pool uncovered. A cover traps wind-blown debris and tends to tear; open water actually handles storm debris better than a cover does.
6. We photograph the pool and equipment pad beforehand, for insurance, in case anything needs to be documented afterward.
7. Afterward, we clear debris before restarting anything, check the equipment pad for flooding, and inspect the salt cell and pump for water intrusion before restoring power.

Why "don't drain" matters more than it sounds like it should

It's tempting to drop the water level a lot before a storm "just in case." But our own logs show how much a pool's water balance already moves on its own in August heat, with zero draining involved. Between August 4 and August 30, 2026, our logged salt reading drifted from 3,100 ppm to 3,914 ppm — about a 26% rise in under four weeks, purely from evaporation concentrating dissolved salt faster than top-offs diluted it.

That's how fast an outdoor pool's chemistry moves in a normal week of Gulf Coast summer heat — before you add several inches of tropical rain diluting everything at once, or days without power to correct for it. It's a big part of why over-draining before a storm just trades one imbalance for a worse one.

CYA creeps up fast under full summer sun

Stabilizer (CYA) doesn't break down under UV the way chlorine does, so it just accumulates. In our own logs it climbed from 60 ppm on August 5 to 73 ppm by August 13 — a 13 ppm rise in about a week. That matters for storm prep specifically: the higher CYA sits, the more free chlorine it takes to actually get an effective shock dose before the power goes out, since CYA suppresses how strongly a given FC level actually sanitizes.

Don't trust that your numbers will hold

One more real example from our log: on August 12 our total alkalinity tested at 75 ppm. One day later, August 13, it read 14 ppm — and pH had jumped to 8.0 the same day. Water chemistry on a saltwater pool can swing a lot faster than a weekly testing habit assumes. If a storm is inside the five-day cone, we test again close to the actual prep day rather than relying on a reading from earlier in the week.

Storm prep aside, this same saltwater setup drifts in other predictable ways year-round — see why our pH keeps climbing on this coast for the mechanism and the real numbers behind it.

This page reflects one homeowner's real, logged experience maintaining a residential saltwater pool on the Florida Panhandle coast. It is not professional, engineering, or structural advice, and it is not a substitute for guidance from a licensed pool professional — especially for anything involving your pool's structural safety before a storm.