LA Pool Winterization: A Different Game
If you search 'pool winterization,' most of what you'll find is for cold-climate pools—draining pipes, blowing out lines, covering everything up for 5 months. That's not LA. Our winters are mild, and most pool owners swim year-round (especially with a heater). But that doesn't mean you can ignore seasonal changes.
Here's what actually matters for LA pool care during the cooler months, and where you can save money by skipping unnecessary steps.
What You Should Do (October-February)
Reduce Pump Runtime
In summer, your pump might run 8-10 hours per day. In winter, 4-6 hours is typically sufficient. Less sunlight means less algae growth, and cooler water needs less circulation. This alone can save $30-$60/month on electricity.
Adjust Chemical Balance
Cooler water holds chlorine longer. You'll use 30-40% less chlorine in winter. But pH can drift higher due to less swimmer activity, so test weekly and adjust. Calcium hardness and alkalinity should still be checked monthly.
- Chlorine: Reduce to 1-2 ppm (from summer's 2-3 ppm)
- pH: Maintain 7.4-7.6
- Alkalinity: 80-120 ppm
- Calcium hardness: 200-400 ppm
- Monthly chemical cost drops from ~$80 to ~$45
Clean Filters
Do a thorough filter clean at the start of the cooler season. For cartridge filters, replace if they're over 18 months old. For DE filters, do a full breakdown and recharge. Clean filters work more efficiently when running fewer hours.
Check Heater
If you heat your pool in winter (many LA homeowners do), service the heater before cold nights arrive. Clean burners, check ignition, and verify the heat exchanger for scale buildup. A service call costs $150-$250 and prevents mid-winter breakdowns.
What You Can Skip
- Draining the pool: Never necessary in LA unless doing a replaster
- Pipe winterization/blowing lines: LA doesn't freeze (with very rare exceptions in mountain communities)
- Full pool covers: Optional for debris control, but not needed for freeze protection
- Closing the pool: LA pools don't 'close'—keep circulation running year-round
The Exception: Mountain Communities
If you're in Wrightwood, Palmdale, Lancaster, or other high-elevation communities, overnight freezing is real. In these areas, you'll need freeze protection—either an automatic freeze guard on your pump or pipe insulation. Freeze damage to pool equipment can cost $2,000-$10,000 to repair.
💡 Pro Tip
Install a freeze guard ($200-$400) if your pool equipment is in an exposed area. It automatically turns on the pump when temperatures drop below 36°F, preventing frozen pipes.
Winter Pool Costs Compared to Summer
- Electricity: $80-$120/month (vs. $140-$200 summer)
- Chemicals: $30-$50/month (vs. $60-$100 summer)
- Heating (if used): $100-$300/month
- Total winter operating cost: $210-$470/month
- Total summer operating cost: $200-$300/month (no heating)
Elan showed us how to cut our winter pool costs by 40% just by adjusting the pump schedule. Simple stuff that our old pool guy never mentioned. — Linda R.
Frequently Asked Questions
Do I need to winterize my pool in Los Angeles?
Not in the traditional sense. LA winters are mild enough to keep your pool running year-round. Adjust pump runtime and chemical levels, but no draining or pipe blowing needed.
Should I cover my pool in winter?
A cover reduces debris and heat loss but isn't necessary for freeze protection in most LA areas. Solar covers help if you heat your pool.
How much does it cost to heat a pool in LA winter?
Gas heating runs $100-$300/month to maintain comfortable swimming temperatures (78-82°F) during LA's cooler months.
Can pipes freeze in LA?
In most LA areas, no. In mountain communities above 3,000 feet elevation, overnight freezing is possible. Install a freeze guard for protection.
