Heading Back to the Valley for the Winter? Get Your Pool Ready First

If you're one of the Valley's snowbirds — spending summers somewhere cooler, then coming back to Gilbert or the East Valley around October or November — your pool has just been through the hardest four months of its year without you.

The good news is that a pool that had someone looking at it over the summer usually needs very little. The pool that had nobody looking at it is a different conversation, and the gap between those two outcomes is bigger than most people expect. Here's what actually happens, and what to sort out before you land.

What happens to a pool left alone over an Arizona summer?

The water level drops — a lot. Evaporation in this climate is serious. If the level falls below the skimmer mouth, the pump starts pulling air instead of water. Best case it loses prime and stops circulating. Worst case it runs dry, and a pump that has run dry is often a replacement rather than a repair.

That single failure is behind a large share of the bad-surprise arrivals we see. Everything else on this list is recoverable; a seized pump is a bill.

Chlorine runs out and stays out. A tab feeder or a floater holds a finite amount. Once it's empty, in July, the pool is unsanitized in 90-degree water. Algae follows quickly.

Chemistry drifts in one direction. As water evaporates, what's dissolved in it stays behind and concentrates. Calcium hardness climbs. In the East Valley, where the fill water is hard to begin with, a summer of evaporation and top-ups pushes it up further — and that's what's behind scale on tile, cloudy water that won't clear, and rough patches at the waterline. There's more on that in our hard water and calcium guide.

Equipment sits idle in extreme heat. Seals dry out, timers drift or lose their schedule after a power cut, and automation sometimes comes back up in a state nobody intended.

Anything organic that blew in stays in. Monsoon season runs from mid-June into late September, so the pool has almost certainly taken at least one storm while you were gone — see what a monsoon storm does to a pool.

What should I sort out before I arrive?

Have someone look at it before you land, not after. This is the whole point. A pool that gets checked in the weeks before you arrive can be ready on the day. A pool first looked at the morning you land is a pool you'll be waiting on.

The specific things worth having done ahead of your arrival:

• Water level brought back up and the skimmer confirmed working
• The pump actually run and observed — not just switched on, but watched to confirm it primes, holds prime, and isn't making noises it shouldn't
• Filter cleaned — after a summer and a monsoon, it has earned it
• A full water test, particularly hardness and stabilizer, which are the two that drift most over a long gap
• The heater checked before you need it, not the first cold evening — see below
• A look at the equipment pad generally, because summer is when small leaks and failing seals reveal themselves

If the pool has gone green, that needs the most lead time of anything on this list, which brings us to the question everyone asks late.

How much notice do I actually need?

More than a day, and the honest answer depends entirely on what state it's in.

• Maintained over summer: essentially ready. A normal service visit.
• Neglected but still blue: a few days to rebalance and get filtration caught up.
• Green: a genuine recovery — multiple visits over several days, sometimes longer if it's badly gone.
• Green and stained: the water can be fixed in days; the plaster may need an acid or chlorine wash, and that's a drained-pool job that needs scheduling.
• Equipment failed: parts availability decides the timeline, not us.

The practical advice: get someone to look at it two to four weeks before you arrive. That's enough time to find out which of those five you're in while it's still cheap to be in a bad one.

That first visit isn't the end of it, though. The pool still needs to be maintained from then on to ensure it stays clean upon your arrival.

Do I need the heater checked if I'm only here for winter?

Yes, and it's the item most people leave until it's a problem.

The biggest issue we see when people return is that their heater is no longer working properly. They expect to be able to swim in the cooler weather, and are surprised to find that their pool or spa won't heat up. Then they're waiting on a repair.

Winter is exactly when a Valley pool heater earns its keep. Daytime air can be pleasant in December and January while the water sits well below comfortable — the pool loses heat overnight and the winter sun doesn't put it back. If you plan to swim between November and March, the heater is the difference between a pool and an ornament.

The catch is that heaters spend the summer switched off in extreme heat, and problems surface on the first cold evening you try to use one — which is also when everyone else discovers theirs. Get it fired and checked while the weather is still mild. We cover heaters and heat pumps on our repairs and equipment page.

Heaters can also malfunction from rodent damage, and from heat wearing down the electronics. Rodent damage can be prevented with heater rat-proofing kits, which we do install.

The same logic applies to a pool light you haven't used since April and any automation that lost its schedule during a summer power cut.

Is it worth paying for service while I'm away?

It's the question that decides everything else on this page, so here's the straight version.

Paying for service through a summer you're not here for feels like paying for nothing. What you're actually buying is the difference between arriving to a pool that's ready and arriving to a recovery — and a recovery, plus whatever the equipment did while nobody was watching, typically costs more than the service would have.

The pump is the clearest case. Service through the summer means someone keeps the water level above the skimmer. Nobody watching means a real chance of a pump that ran dry, and that's a bill that dwarfs the service.

We do vacation service for exactly this — the pool is looked after while the house is empty, and you get photos after every visit, so you can see the state of it from wherever you are rather than wondering. For a house sitting empty, that photo record is worth something on its own.

Another thing we tend to find, unfortunately, is that pool companies severely neglect pools or stop showing up altogether, unbeknownst to the customer. So even if you have a company caring for your pool, double-check on it in some way — something as simple as requesting photos, all the way up to hiring another company just to inspect. Again, we recommend doing this well before your expected arrival.

If you'd rather not run service year-round, the middle option is a reduced schedule over summer plus a pre-arrival visit. It's not as good, but it's a great deal better than nothing, and it protects the expensive failure.

A short checklist before you fly

• Someone booked to check the pool two to four weeks before you arrive
• Water level and skimmer confirmed
• Pump watched, not just switched on
• Filter cleaned
• Water tested — hardness and stabilizer especially
• Heater fired and checked before you need it
• Lights and automation confirmed working
• Photos from a visit, so you know what you're walking into

Coming back to Gilbert or the East Valley soon and not sure what state it's in? Tell us the address and your arrival date and we'll get eyes on it before you land.

Drafted with editorial support, then edited, corrected, and signed off by Josiah Linaman from his own experience on East Valley pools. Anything specific to a real job — the numbers, the photos, the opinions — is his.