What Monsoon Season Means for Phoenix Pool Care
The work you do before a storm hits will save you hours of cleanup and prevent expensive repairs. Here’s the monsoon prep routine I recommend for every Phoenix pool owner.
Arizona’s monsoon season runs from June 15 through September 30, bringing high winds, dust storms (haboobs), lightning, and heavy rain. Phoenix gets roughly 33% of its annual rainfall during these months — about 2.71 inches on average.
The mix of heat, humidity, and sudden rain creates perfect conditions for:
- Algae blooms
- pH and alkalinity swings
- Cloudy water
- Equipment strain
This is the time of year when consistent Phoenix pool care is non‑negotiable.
Pre‑Storm Phoenix Pool Care: How to Prepare Your Pool
The work you do before a storm hits will save you hours of cleanup and prevent expensive repairs. Here’s the monsoon prep routine I recommend for every Phoenix pool owner.
Clean and Prep Your Filtration System
A clean filter handles debris far better than a clogged one. Before monsoon season — and again after major storms — make sure to:
- Clean cartridges or DE grids
- Backwash if needed
- Inspect pressure levels
This 30‑minute step prevents your pump from struggling when debris floods the system.
Balance Your Water Chemistry Before the Storm
Start monsoon season with balanced water so rain doesn’t throw everything out of range.
Recommended levels:
- Total Alkalinity: 80–120 ppm
- pH: 7.4–7.6 (acceptable range 7.2–7.8)
- Calcium Hardness: 180–220 ppm
Stable water chemistry helps your pool resist sudden swings caused by acidic rainwater.
Trim Trees and Secure Loose Items
High winds turn yard debris into pool debris.
- Trim branches hanging over the pool
- Bring in or tie down chairs, umbrellas, and toys
- Remove anything light enough to blow into the water
A single flying chair can crack tile or chip plaster.
Protect Your Pool Equipment
Your pump, filter, and heater are expensive — protect them.
- Turn off breakers before the storm
- Cover the equipment pad if possible
- Ensure electrical connections are sealed
- Keep the pump motor dry
Lightning‑related surges can fry a control board instantly.
Should You Cover Your Pool?
Short answer: No.
Both Arizona Pool Guy and We Heat Cold Pools advise against using covers during monsoon season — and I agree. Wind dumps debris onto the cover, and removing it sends everything straight into the pool.
Unless you have a fully sealed automatic safety cover, leave the pool uncovered.
Phoenix Pool Care During the Storm
Once the storm hits, your priority is safety — not the pool.
Stay Inside and Stay Safe
Don’t try to remove debris or check equipment during the storm. Lightning and slippery surfaces make it dangerous, and more debris will blow in anyway.
Turn Off Power If You Haven’t Already
If you can safely access your breaker panel, turn it off:
- Pump
- Heater
- Pool lights
This protects your electronics from power surges.
Post‑Storm Phoenix Pool Care: Cleanup & Recovery
When the storm clears and your pool looks like a swamp, don’t panic. Follow this order and you’ll have clear water again quickly.
Inspect for Damage and Check Equipment
Walk the pool area and look for:
- Broken branches
- Damaged tiles or plaster
- Standing water around the pump motor
Turn the breakers back on and listen for unusual pump noises.
Remove Debris and Skim the Surface
Start with the big stuff:
- Skim leaves and branches
- Empty skimmer and pump baskets
- Vacuum to waste if there’s heavy dust or silt
Organic debris left in the water feeds algae, so remove it fast.
Lower Excess Water If Needed
If rain pushed the water level above the skimmer:
- Turn off the autofill
- Backwash to lower the level (250–1,000 gallons depending on filter size)
Ideal water level: mid‑skimmer opening.
Test and Adjust Water Chemistry
Rainwater dilutes chemicals and lowers pH.
After a storm, adjust:
- pH: 7.2–7.6
- Alkalinity: 80–120 ppm
- Calcium Hardness: 180+ ppm
Balancing early prevents cloudy water and algae.
Shock the Pool and Add Algaecide
Storms introduce bacteria and algae spores.
Do this immediately:
- Shock the pool (follow label instructions)
- Add a non‑copper algaecide
- Run the pump 8–12 hours continuously
You should see the water clearing within 24 hours.
Phoenix Pool Care FAQs
Should I drain my pool before a monsoon?
No. Draining risks pool interior damage and can cause the pool to float if the water table rises.
How long should I run my pump after a storm?
Run it 8–12 hours straight after shocking, then return to your normal summer schedule (usually 8–10 hours/day in Phoenix).
What pH should I aim for after heavy rain?
Most experts recommend 7.2–7.8. I personally keep it 7.4–7.6 for optimal chlorine performance.
Should I use a pool cover during monsoon season?
No — debris collects on the cover and falls into the pool when removed. Leave it off unless you have a sealed automatic cover.
Final Thoughts on Phoenix Pool Care During Monsoon Season
Monsoon season doesn’t have to wreck your pool. With smart preparation, safe practices during storms, and a solid cleanup routine afterward, your pool will stay clear, healthy, and ready for summer. After fifty years in Phoenix pool care, these steps have never failed me — and they’ll work for you too.
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