Summer Heatwaves & Your Car: Top Tips for Hot Weather Driving

Summer has officially arrived — and with it, the heatwaves. While we might enjoy the sunshine, high temperatures can spell trouble for your vehicle. Across the UK, drivers have already experienced breakdowns caused by overheating engines, battery issues, and even melted interior components.

So, how can you keep your car cool and in good shape during the hotter months?

Here are our top tips for driving in hot weather and keeping your vehicle road-ready — whatever the temperature.

1. Check Your Coolant Levels

Your engine works harder in hot weather, and your cooling system is its first line of defence.

• Check your coolant level regularly and top it up if needed.
• Make sure the coolant mixture (water and antifreeze) is correct — don’t just add plain water, as it may evaporate or cause overheating.

A low or leaking cooling system is one of the most common causes of summer breakdowns.

2. Inspect Tyres More Often

Hot roads and underinflated tyres are a dangerous combination.

• Check tyre pressure when they’re cold, not after a long drive.
• Look out for cracks or signs of wear on the sidewalls.
• Don’t forget your spare tyre (if you have one).

High temperatures can cause tyres to expand, making any existing issues worse.

3. Keep an Eye on Battery Health

Heat can speed up battery fluid evaporation and increase the risk of corrosion.

• If your battery is more than 3 years old, have it tested.
• Make sure the terminals are clean, secure, and corrosion-free.

A battery that’s been weakened by heat may not survive the next cold snap.

4. Check Air Conditioning Before You Need It

There’s nothing worse than discovering your A/C doesn’t work on the hottest day of the year.

• Run your air con before the heatwave hits to check it’s working properly.
• If it’s blowing warm air, it may need a re-gas or servicing.

Efficient air conditioning isn’t just about comfort — it helps keep you alert and safe on long journeys.

5. Windscreens & Wipers Need Love Too

Sunlight can make chips and cracks worse, and dried-out wipers are a hazard in sudden summer showers.

• Fix any windscreen chips before they spread.
• Replace worn or cracked wiper blades.
• Keep your washer fluid topped up — with a summer mix that includes bug remover if needed.

6. Pack an Emergency Kit

Just in case the worst happens, it pays to be prepared. Keep these essentials in your car:
✅ Bottled water (for you and passengers)
✅ Sunglasses (to reduce glare)
✅ Mobile phone charger or power bank
✅ Warning triangle and hi-vis vest
✅ First aid kit
✅ Basic toolkit and torch
✅ Sun cream (if you’re stranded in full sun)
✅ Snacks and any regular medication
✅ Blanket or umbrella for shade

Final Thoughts

Hot weather brings more than just sunburn — it puts pressure on your vehicle too. A quick vehicle check before heading out on long summer drives could save you hours stuck at the roadside.

Stay cool and drive safe.