Get the Garage Door Ready for Rain Season in Long Beach Before the First Storm

Published August 20, 2026

Rain in this city is not a climate, it is an event. Long Beach spends the great majority of the year dry, then takes most of what it is going to get in a handful of storms between November and March. That concentration is what makes garage doors here behave the way they do.

A door in a wet climate is under constant low grade stress and it fails gradually. A door here sits in dry, salty air for eight or nine months, developing faults that nothing tests, and then gets everything thrown at it in one week. Which is why the calls come in bursts. The first serious storm of the season generates more work in three days than the previous quarter.

Almost none of it is new damage.

Nothing the Rain Finds Is New

This is the part worth internalising before anything practical. Water does not usually break a garage door. It exposes what was already broken.

The splice that corrodes and starts nuisance reversing had been sitting open to the air since somebody ran the sensor wire. The apron that channels water at the door has sloped that way since it was poured, or since the slab edge settled some years ago. The release cord that will not budge seized because nobody has touched it since the opener went in. The door that binds at the jamb had been running with almost no clearance left all summer.

Rain is the test, not the cause. And a test everybody sits at once, in the same week, is a bad week to be looking for a tradesman.

Start Outside, With a Level

The single most common conversation we have goes like this. Water came under the door. Can you fit a better seal.

Sometimes yes. Often no, and fitting one is money aimed at the wrong end of the problem.

A garage door bottom seal is a flexible strip that closes a gap. It handles a wet floor and a shallow film of water reasonably well. It does not handle water arriving with momentum, and it certainly does not handle a slab that is delivering a stream directly to it. If the ground outside is pointed at your garage, the seal is being asked to be a dam and it will lose.

So we start with a level on the concrete outside the opening.

Fall away from the door. The apron should shed water outward. A surprising number do not, either from the original pour or from settlement. Clay soils in this part of the county move with the wet and dry cycle, and an edge that has dropped even slightly across a wide opening collects a lot of water.

The threshold joint. Where the apron meets the garage slab there is usually a joint. When it opens up it holds water against the exact line the seal is trying to close.

Ponding. Any dish or low spot that keeps a puddle sitting against the bottom section. Standing water finds its way under things given time, and it rusts a steel bottom section from below where nobody looks.

Where the downspouts land. This is the big one. A downspout takes an entire roof plane and concentrates it into one outlet. If that outlet discharges within a few feet of the garage opening onto a slab that falls the wrong way, then the drainage design of the house is actively aiming water at your door.

Moving a discharge point, extending it, or cutting a channel to take it somewhere else is often the whole fix. It is cheaper than a seal and it addresses the actual cause.

Why Doors Bind in Wet Weather

The second seasonal complaint, and one that puzzles people, is a door that has run smoothly for months and starts groaning, catching, or stopping part way up as soon as the weather turns damp.

Wood is the obvious half. A timber or composite door takes up atmospheric moisture and grows, mostly across the grain rather than along it. The movement is small in absolute terms but a garage door is wide, and the clearance at the jambs is not generous to begin with.

The less obvious half is that a steel door in a timber opening does the same thing, because the opening moves even though the door does not. Tracks are lagged to the jambs. The jambs and header take up moisture, swell, and shift the tracks slightly inward. The door has not changed. Its room to move has.

Either way, the result is a door catching at the jamb or dragging in the track, and an opener that reads the extra resistance as an obstruction and reverses. On a force setting that has been cranked up over the years, the opener does not reverse. It just pushes, which is how track gets bent and how a section picks up a crease that never comes out.

The fix, done in advance, is minor. Clearance is checked, tracks are trued, hinges and rollers are looked at, and the opener force is set where it belongs rather than where somebody wound it to stop the door reversing last winter. Done in January on a door that has already been forced twenty times, it is a different job with different parts.

The Damp Electrical Fault Everybody Misdiagnoses

If one thing in this article saves somebody money, let it be this one.

Photo eye sensors, the pair of small units near the floor on either side of the opening, are the entrapment protection required under UL 325. They break an infrared beam across the opening, and if the beam is interrupted while the door is closing, the door reverses. They are the reason a closing garage door does not close on a child.

They are also blamed for a great deal that is not their fault.

The sensors themselves are reasonably robust. What is not robust is the low voltage wiring feeding them. That is thin bell wire, frequently stapled along a stud, sometimes run through insulation, and very often joined somewhere along its length with a twist-on wire nut because the original run was too short or somebody moved a sensor.

A wire nut is not a sealed connection. In a damp garage in a wet week, moisture gets into the cap, the copper corrodes, and the joint goes green. Corrosion raises resistance. The signal weakens. The opener sees a beam that is not being reported properly and treats it as blocked, so the door starts back up a foot from the floor with nothing anywhere near it.

The classic symptom set is exactly this. It only happens when the weather is wet. It happens more in the evening. Cleaning the lenses does nothing. Replacing both sensors does nothing, which is the expensive part, because plenty of people replace them twice.

Cut the splices out, strip back to bright copper, and re-make the joints with sealed connectors. It takes twenty minutes and it fixes the fault outright.

While we are on damp and electricity, the opener receptacle is worth a look too. Garage circuits are commonly on a ground fault protected outlet, correctly, and a genuinely damp garage can nuisance trip one. An opener that appears dead after a wet night, on a house where nothing else is wrong, is often just an outlet that has tripped and nobody thought to look at the reset button.

When the Power Goes Out

Storms take power out. Rarely for long here, but a few hours in the evening happens most winters, and for many houses the garage door is the only route the car has to the street.

An opener without power lifts nothing at all. So the question is what your backup is.

Battery backup. California has required battery backup on residential garage door openers installed or replaced in the state since the first of July 2019. If your opener dates from after that it has one. The open question is whether the battery still holds anything. A sealed cell sitting on float charge for several years may give you a couple of cycles or may give you none, and the status light on the head unit tells you the battery is connected, not that it is any good. It wants a load test.

If your opener is older, it is not illegal and nobody is going to make you change it. But many manufacturers sell a retrofit backup module for models that accept one, and it is not an expensive fit. Where a model does not accept one, that is worth knowing too, rather than finding out in the dark.

The manual release. Every opener has the red cord hanging from the trolley. Pulling it disconnects the door from the opener so the door can be worked by hand.

Pull it with the door closed wherever possible. That is the safe case. The springs are still carrying the weight, and a properly balanced door lifts by hand without much effort.

With the door open, be careful. What is holding the door up there is spring tension, and if a broken spring is the reason you are reaching for the cord in the first place, releasing the trolley removes the only thing still restraining a very heavy door. If the door is up and you have any doubt about the springs, leave it alone and call somebody.

And test the thing occasionally. Release cords seize. The cable stiffens, the trolley mechanism gums up with dust, and the first attempt at using it should not be during an outage.

The Pre-Season List

Short, and none of it dramatic.

1. Level on the apron. Confirm it falls away from the door.
2. Find where every downspout discharges and move any that land near the opening.
3. Clear the threshold joint and any low spot that ponds.
4. Check clearance at both jambs before timber takes up moisture.
5. True the tracks, check hinges and rollers, look at the bottom section for rust.
6. Open every sensor splice and re-make it sealed.
7. Run both safety reversal tests, the beam test and the force test.
8. Load test the opener battery, or price a retrofit if there is not one.
9. Free and test the manual release, and show a second person in the house how it works.
10. Look at the bottom seal last, and leave it alone if it is sound.

That is an hour, and most of the time it finds two or three small things. The point is not the drama. The point is that all of it is easy in a dry September garage and none of it is easy in a running storm.

What This Costs You to Ignore

Nothing at all, in a dry winter. That is honest, and it is why people skip it.

In a wet one it costs a callout at an emergency rate in the week everybody else is also ringing, plus whatever the door damaged itself doing while it was binding, plus whatever was in the garage when the water came in. The maths only works one way.

If the door is currently stuck open and rain is forecast, say that when you ring and we will move you up the list. If it is running fine and the season has not started, that is the better call to make.

Avoiceforbrady, Long Beach. Call (562) 709-4729.