When to Close Your Pool in Redding, CA: Deadline, Window & Checklist

Redding closing dates at a glance

Redding's 159-day warm season leaves comfortable margins on both ends — the windows above aim you at the cheap-chemistry versions of each transition.

The same model in water terms: Redding's estimated pool temperature runs about 58°F in mid-April, 75°F in mid-June, 82°F in mid-August, and 68°F in mid-October, peaking near 84°F. Those four checkpoints — not any calendar holiday — are what the windows above are protecting.

The 12-step Redding winterizing checklist

A closing is a plumbing project with a chemistry warm-up. Start a few days ahead of your target date, keep every dose per its product label, and don't skip the photographs — spring-you reassembles from them.

1. Balance the water a few days ahead

   Three or four days before closing, adjust alkalinity and pH into label ranges. Balanced water is gentler on the liner, plaster, and equipment through the long covered months ahead.

2. Deep-clean the pool

   Brush, skim, and vacuum like company's coming. A pool that goes under the cover spotless comes out needing a rinse; one that goes under dirty comes out needing a project.

3. Service the filter one last time

   Clean media goes into storage, dirty media comes out worse: backwash the sand or DE, rinse the cartridges, all per the manual, before anything drains.

4. Apply winter chemicals per label

   Dose the winter kit while the pump still runs — every product exactly per its label for your volume — so the chemistry is fully mixed before the system goes quiet.

5. Lower the water level

   Take the level down only as far as the cover's manual says — usually just below the skimmer for solid covers, higher for many mesh systems. An empty pool is never the goal; shells crack and shift without water's weight.

6. Blow out the lines and plug returns

   Work line by line: push air until the return spits dry mist, plug it against the flowing air, move on. Skimmer, returns, cleaner line, in whatever order your plumbing prefers — dry pipes are the entire point of closing.

7. Protect the skimmer

   Give the skimmer something cheap to break: a guard bottle or rated plug absorbs the ice expansion that would otherwise split the housing.

8. Add pool antifreeze where blowouts fall short

   Doubt is the criterion: any run you can't confirm dry gets pool-grade antifreeze at the label's per-foot rate. The automotive jug from the garage is for cars — it has no business in pool plumbing.

9. Drain the equipment

   Open every drain plug on the pump, filter, heater, and chlorinator, and store the plugs in the pump basket so spring reassembly is a one-stop hunt. Move what you can indoors.

10. Set the air pillow and cover

    Center an inflated air pillow, then fit the cover and secure it with water bags, cable, or straps as designed. The pillow gives ice a place to push besides your walls.

11. Winterize the water features

    Waterfalls, slides, and spillover spas hold water in places gravity won't clear — blow those lines separately and plug them, or they'll be the one crack you find in spring.

12. Remove and store ladders and rails

    Pull ladders, rails, and the diving-board hardware; rinse, dry, and store them out of the weather. Anchor sockets get a dab of protectant so spring bolts turn freely.

What to buy before the rush

Every item below sells out somewhere in California every October. Stocking the short list before the rush costs nothing extra and saves the mid-project store run — the chemicals guide explains what each category actually does.

• Cover pump

  Solid covers collect rain all winter; this is the drainage plan.

• Expansion plugs + skimmer guard

  Cheap rubber that stands between ice and your fittings.

• Pool antifreeze

  Backup for unverifiable lines; label rate per foot of pipe.

• Winter closing kit

  Closing chemistry in one box, dosed by pool volume.

• Air pillow

  Gives ice somewhere to push besides your pool walls.

• Winter cover

  The one purchase every other closing step depends on.

How Redding compares locally

Redding closes in the later half of California's calendar. Neighbors run close: Chico (63 mi away) models its deadline at November 1 (3 days earlier vs Redding's November 4), while Yuba City (106 mi) shows November 9. The spring mirror of this page is the Redding opening guide, and the season overview draws both windows on a single bar.

The measuring stick here is Redding Municipal Airport — 5.0 miles to the southeast, elevation about 497 feet. Its 1991–2020 record is what the model reads for Redding; your backyard in Shasta County will run a touch warmer or cooler with shade, wind, and pavement, which is exactly the slack the two-week lead absorbs.

Field notes for Redding owners

What comes indoors

Cartridges, the cover pump when idle, chemical containers, and anything with a small motor overwinter better in the garage. Cold cycling is hard on plastics and seals; shelf space is cheaper than replacements. Label a single bin now and spring assembly becomes a scavenger hunt with a map.

The skimmer is the most breakable part you own

Skimmer bodies crack because water freezes inside the throat with nowhere to push. A sacrificial bottle or spring-loaded guard absorbs that expansion for a few dollars. It's the highest-return item in the entire closing kit relative to what it protects.

Match the drainage plan to the cover

Solid covers shed nothing — they need a cover pump staged before the first storm and checked after each one. Mesh covers drain themselves but pass silt that settles all winter. Either way, the plan is decided in October, not improvised in January when the cover is an ice sheet.