Arizona monsoon season runs June 15 through September 30. For most of those weeks, your Queen Creek pool is fine — it's the four or five storm afternoons per summer that turn a clean pool into a chemistry emergency overnight. This guide covers what to do before, during, and after a monsoon storm so you don't come out the other side with a green pool, a burned-out filter, or a heater that's been surge-fried.
Before the storm — pre-monsoon prep checklist
Do this annually in early June, before the first storm hits. Repeat in late July if you got a quiet first half of the season.
Chemistry, the day before a forecasted storm
- Over-shock the day before. Run free chlorine to 10-12 ppm so you have headroom when organic load lands. If you're on salt, run a 24-hour superchlorination cycle. If you're on chlorine tabs, dose with cal-hypo or liquid chlorine.
- Top up cyanuric acid (CYA) toward 50 ppm. Stabilizer protects chlorine from burning off in UV, which is what keeps pre-storm shock useful for the next 48 hours instead of two.
- Adjust pH toward 7.4. Higher pH means chlorine is less effective. Slightly low going in is fine and gives you margin as monsoon dust drives pH up.
- Test alkalinity. If alkalinity is under 80 ppm, pH will swing hard with rain inputs. Bring it to 100 ppm minimum.
Equipment, the morning of
- Clean the filter. Don't hit monsoon debris load with a partially-loaded cartridge or DE filter — pressure will spike, flow will drop, and you'll do double work after.
- Verify pump priming and seals. Wet leaks at the pump volute or threaded fittings get worse under monsoon rain intrusion.
- Check automation modes. If you have an IntelliCenter / OmniLogic / iAquaLink system, set it to a known good schedule before the storm — automation that loses power and comes back to default settings sometimes turns features on you didn't want running.
- Move loose items off the pool deck. Furniture, umbrella stands, planters — they end up in the pool or against equipment.
The Pool Dads pre-monsoon prep service
If you'd rather not run the checklist yourself, the pre-monsoon prep service covers over-shock + stabilizer top-up, deep filter clean, equipment housing inspection, and a pre-storm chemistry log — one visit, flat price, before the season ramps up.
During the storm — equipment shutdown sequence
When lightning becomes active or the weather service issues a severe storm warning, shut down the pad. Order matters:
- Turn off any pool heater first. Gas heaters need to cool before pumps stop circulating water, otherwise heat exchangers can be damaged.
- Switch pump to off via the breaker or automation. Don't rely on a switch that's still energized — a power surge on a running pump is what fries motors.
- Power down automation panels at the breaker if you can. Modern controllers have surge protection but it's imperfect. Breaker-off is a guaranteed safe state.
- Let the system stay off until 30 minutes after the storm passes. Brownouts and aftershock surges are common in the hour following a monsoon cell.
If you're traveling during monsoon season, set this as an automation schedule before you leave, or — if you're a Pool Dads weekly customer — call the morning of and we'll shut your pad down remotely.
After the storm — recovery checklist
Most storms drop more debris than damage. The recovery work is mostly mechanical and chemical.
Within 24 hours
- Skim the surface. Get organic debris off before it starts breaking down — leaves and palm fronds give up chlorine as fast as anything you'll see.
- Empty the skimmer and pump baskets. Twice if the wind kicked up overnight. Heavy debris loads can collapse cheap plastic baskets.
- Restore power and run the pump. Don't skip the surge inspection — check that automation booted cleanly, salt system is producing, and heater (if used) is functioning.
- Test free chlorine, pH, and total chlorine. If free chlorine is under 1 ppm and total chlorine is high, you have chloramines from organic load — dose with shock to break them.
Within 48-72 hours
- Brush walls and steps. Don't wait for algae growth to be visible. Brush around any debris contact points on plaster.
- Vacuum the floor. Fine dust from monsoon storms settles on the floor and clogs filters faster than you'd expect.
- Pull and rinse the filter. Cartridge or DE — a monsoon storm typically clogs a clean filter back to its dirty pressure within 48 hours of circulation. Rinse it, don't just backwash.
- Re-balance chemistry. Storm runoff usually drives alkalinity and pH up. Acid down as needed; rebuild CYA if you used significant amounts of liquid chlorine to clear the post-storm load.
When to call a pro vs. handle it yourself
Call a Queen Creek pool service company after a monsoon when:
- The pool isn't clearing within 48 hours of restored pump operation — algae is winning and you'll burn through chemicals fighting it solo.
- Filter pressure is 10+ psi above clean and rinsing isn't dropping it — internals may be damaged or you may need a full chemical degrease.
- Equipment shows surge damage — pump won't prime, automation panel display is dead, salt cell shows fault codes.
- You're out of town during the storm and the pool went a week without service.
Pool Dads' Full Service Plus subscribers get free post-monsoon cleanup with a 48-hour response window — no callout fee, no per-bag rate. Non-subscribers can book a one-time green-to-clean or filter clean at the published rate.
Ready for the season?
If you'd rather have a pro handle the prep work, book a one-time pre-monsoon prep. If you'd rather not think about it at all, weekly service with Full Service Plus includes ongoing monsoon coverage from June through September.