How to Prepare Your Car for Summer

Key Takeaways

• Preparing your car for summer helps prevent breakdowns and improves driving safety.
• Checking fluids, tire pressure, and your battery helps keep your vehicle running smoothly.
• Regular maintenance ensures your car is ready for road trips and hot weather driving.

Most people think of winter as the hard season for cars, and it is, but summer has its own set of challenges. Heat stresses your cooling system, your battery, your tires, and your interior. A car that ran fine through spring can start causing problems once temperatures consistently hit the 90s. The good news: a few quick checks before summer hits can prevent most of it. Let’s go over what you should check to prepare your car for summer temperatures.

1) Air Conditioning: Test It Before You Need It

There is nothing worse than discovering your A/C doesn’t work on the first genuinely hot day of the year. Test it early, like late spring, early.

• Turn the A/C on and check that it’s blowing cold air within a minute or two of running.
• If it blows cool but not cold, it may be low on refrigerant. This requires a recharge; you can do a basic recharge yourself with an A/C Pro recharge kit or take it to a shop.
• If it blows warm air or makes unusual noises, that’s a sign of a more significant issue. Get it inspected before summer.
• Have your cabin air filter checked at the same time. A clogged cabin filter reduces airflow through your vents; it’s an inexpensive, easy fix (often under $20 for the part).

2) Coolant/Antifreeze Levels

People associate antifreeze with winter, but it works year-round. The coolant in your engine also prevents overheating in summer by absorbing heat from the engine and dissipating it through the radiator. Without sufficient, clean coolant, summer heat can cause your engine to overheat, which is one of the most damaging things that can happen to a car.

• Check the coolant level when the engine is cold. The reservoir has min/max markings.
• Inspect the color. Fresh coolant is typically bright green, orange, or pink, depending on the type. If it looks rusty or muddy, it needs to be flushed and replaced.
• Check the owner’s manual for your vehicle’s recommended coolant type; not all coolants are compatible.
• Inspect your radiator hoses for cracks, soft spots, or swelling. These deteriorate over time, and a blown hose in summer is a quick way to overheat.

3) Tire Pressure

Hot pavement and high ambient temperatures increase tire pressure, the opposite of what cold weather does. Overinflated tires have less contact with the road and wear unevenly in the center of the tread.

• Check tire pressure in the morning when tires are cold, not after driving. Refer to the door sticker for the correct PSI, not the max pressure printed on the tire sidewall.
• Inspect tread depth using the quarter or penny test. Summer road trips put miles on tires fast. Know where you stand before a long drive, especially if you are going to the beach.
• If you switched to winter tires in the fall, swap back to your all-season or summer tires. Winter tires wear quickly on hot pavement and handle poorly in warm temperatures.

4) Battery

Most people know that cold weather is hard on car batteries. Fewer people know that heat is actually what degrades a battery faster over time. High temperatures accelerate the internal chemical breakdown of a battery, shortening its overall lifespan.

• If your battery is 3 or more years old, have it tested before summer. Most auto parts stores do it for free, but be sure to check before going.
• Signs your battery is struggling: slow engine crank on startup, dashboard battery warning light, or lights dimming when the engine is running at idle.
• Keep the battery terminals clean; corrosion (white or blue-green buildup) increases resistance and makes it harder for the battery to deliver power. A battery terminal cleaner is cheap and takes five minutes.

5) Wiper Blade Wear

Wiper blades wear out year-round. If you changed them for winter, check their condition heading into summer. Summer brings afternoon thunderstorms, sudden downpours, and bugs; your wipers need to be up to the task.

• Replace wiper blades that leave streaks, skip, or make noise.
• Make sure your washer fluid is topped off and appropriate for summer (not a winter formula with added antifreeze, as it can leave residue on the windshield in warm weather).

6) Protect Your Interior from UV Damage

Summer sun does real damage to your car’s interior. Dashboard materials crack, leather fades, and plastics degrade faster with consistent UV exposure.

• A windshield sun shade (like the EcoNour Foldable Sun Shade) keeps interior temperatures dramatically lower when parked and prevents UV damage to your dash. Leave one in your car and use it every time you park in the sun.
• Consider UV-protectant spray for your dashboard and door panels if they’re starting to look dull or dry. 303 Aerospace Protectant is a widely recommended product for this.
• Tinted windows are a more permanent solution; professional tinting blocks UV and keeps the interior cooler.

7) Create a Summer Emergency Kit

Your car emergency kit should be updated for summer conditions. High heat adds specific risks.

• Water, at least one or two bottles in the trunk, in case of a breakdown
• Jumper cables or a portable jump starter
• Basic first aid kit
• Flashlight
• Reflective triangles or road flares
• Sunscreen if you’re waiting roadside in summer heat
• Phone charger or power bank
• Tire inflator 

Summer car prep is less involved than winter prep, but it’s just as worth doing. Most of these checks take under an hour total, and the majority of them can be done by anyone with a rag and a willingness to pop the hood. Getting ahead of heat-related issues before the real summer hits means fewer surprises and fewer sweaty breakdowns on the side of the road in August.