Essential Summer Driving Tips for Drivers and Operators

Summer driving looks easy on paper. Long daylight, dry roads and clear skies. In practice, heat is now one of the hardest tests a vehicle faces all year. Breakdowns climb, tyres fail and passengers get uncomfortable fast. These summer driving tips cover what matters when the temperature rises, whether you drive or manage a fleet.

Why Do Summer Driving Tips Matter More Than They Used To?

Because UK summers are getting hotter, and vehicles are feeling it. Heat is no longer a mild inconvenience. It is a reliability problem, a passenger welfare problem and a scheduling problem all at once. That is a very different picture from ten years ago. The advice has had to move on too.

The numbers back this up. During the summer 2026 heatwaves, the RAC reported daily breakdown call outs running about 20% above normal, with tyre blowouts, battery failures and overheating engines the most common faults. Those are all preventable with basic checks. Most take minutes to carry out. None cost money.

The AA saw the same pattern. Over one week during the June 2026 heat, it attended 54% more overheating breakdowns than the week before. Older vehicles and those already showing a warning light fared worst. Fleet age is now a safety issue, not just a cost one. Check the oldest first.

Heat also triggers formal health warnings now. The UK Health Security Agency and the Met Office run a joint alerting system, and 2026 brought an amber heat health alert as early as May, followed by further amber and red alerts. Those alerts now start earlier each year. Watch for them.

Those alerts exist because heat harms vulnerable people first. If your service carries older passengers, wheelchair users, dialysis patients or children with additional needs, a heat alert is an operational signal rather than background news. It should change how you plan the day. Treat it the way you would treat a snow warning.

So the useful driving tips for summer sit in three groups. Keep the vehicle working. Keep the driver sharp. Keep the passenger comfortable and safe. The rest of this guide works through each group in turn. Every figure quoted is sourced at the end so you can reuse it in your own briefings.

Winter still gets more attention. Summer causes more breakdowns.

What Checks Should You Do Before A Summer Journey?

Five checks catch most summer failures. None of them need a garage. All of them take under ten minutes, which makes them realistic for a volunteer driver doing a morning run or a driver taking a minibus out for the day. That matters, because a check nobody has time for never happens.

The Five Minute Summer Check

• Coolant level. Check it cold, never hot. Low coolant is the fastest route to an overheating engine in stopped traffic. Top up with the correct mix for your vehicle.
• Tyre pressure. Air expands in heat, so pressures rise on a long hot run. Set them cold, to the figure in the handbook, and adjust for a full load of passengers.
• Tread depth. The legal minimum is 1.6mm across the central three quarters of the tyre. Below that you risk a fine of up to £2,500 and three penalty points per tyre.
• Battery health. Heat degrades batteries as much as cold does. If a vehicle has been slow to start, get it tested rather than hoping.
• Air conditioning and ventilation. Run the air conditioning for a few minutes. Weak, smelly or warm output usually means a blocked cabin filter or low refrigerant.

Tread depth deserves a closer look. The RAC notes that wet braking distance can be up to 44% longer on a tyre worn to 1.6mm than one at 3mm. Summer storms arrive suddenly, so legal is not the same as safe. Many fleets replace at 3mm for that reason. It is a sensible policy.

Add three quick extras. Check screenwash, because dry roads throw up dust and insects that smear across the glass. Check every light, since bright days hide a dead bulb. Check the wipers, because summer downpours are heavy and short. All three take under a minute, and none of it needs tools.

One more point for anyone managing a fleet. A defect noticed by a driver and never reported is worse than no check at all. Give drivers a simple way to log faults from a phone, so the office sees the problem the same day. Paper forms rarely make it back to the depot.

Common Summer Vehicle Faults

• Overheating. Worst in queues, where there is little airflow through the radiator. Watch the temperature gauge in stopped traffic.
• Tyre blowouts. Heat plus underinflation plus a heavy load. Trailers and caravans are especially prone because their tyres often sit unused for months.
• Battery failure. High temperatures speed up internal wear, so a weak battery often fails in July rather than January.
• Soft road surfaces. Rule 237 of the Highway Code warns that tarmac can soften in heat, and turn slippery if rain follows a dry spell.
• Air conditioning water. A puddle under a parked vehicle in hot weather is usually condensation. Coloured or oily fluid is not.

How Do You Drive Safely In Heat And Sun Glare?

Slow down, ventilate the vehicle and protect your eyes. That is the short version, and it comes straight from the Highway Code. Rule 237 covers hot weather and is one of the least read rules in the book. Most drivers have never seen it. It is worth a read before June.

The rule says three things. Keep the vehicle well ventilated so you do not get drowsy. Expect the road surface to soften, or to become slippery if it rains after a dry spell. Slow down and stop if bright sunlight dazzles you. All three apply on an ordinary hot day.

That last point has teeth. Carrying on when you cannot see properly can be treated as driving without due care, and insurers have warned it may affect a claim. Pulling over for thirty seconds is always the cheaper choice. The delay costs you almost nothing. A collision costs a great deal more.

Managing Sun Glare

• Clean the windscreen inside as well as out. Interior film from plastics scatters light and makes glare far worse.
• Use the sun visor. The most ignored piece of safety equipment in any vehicle.
• Choose polarised lenses. They cut reflected glare from wet tarmac and other vehicles.
• Avoid category 4 sunglasses. These are too dark for road use and are labelled as unsuitable for driving.
• Keep a spare pair in the vehicle. Useful for pool vehicles where drivers change daily.

Footwear catches people out too. Rule 97 of the Highway Code requires that clothing and footwear do not stop you using the controls properly. Flip flops and loose sandals can slide under a pedal, and that is enough to fail an emergency stop. That is a real risk on a warm morning.

Keep closed shoes in the vehicle and change once you have parked. For volunteer drivers and staff on the road, this is worth putting in writing as a simple expectation rather than leaving it to chance. Put it in your driver handbook and induction pack. It takes one line. Nothing more.

Fatigue is the quiet risk. Heat, glare and a warm cabin all drain concentration faster than usual, so watch for the same warning signs you would treat seriously on a dark winter run. Our guide to driver fatigue covers the detail. Fatigue does not care about the weather. Treat it seriously.

Frustration builds faster in heat as well. Queues are longer, cabins are hotter and tempers shorten, which is why road rage incidents tend to rise in summer. Leaving earlier is a better tactic than driving faster. Building slack into the schedule helps more than any warning you give drivers. It protects passengers too.

How Do You Keep Passengers Safe When It Is Hot?

Cut waiting time, cool the vehicle before boarding and carry water. Most passenger heat problems come from time spent stationary, not time spent moving. That applies whether you run a dial a ride service, a school route or a hospital transfer. Movement creates airflow, and standing still does not. Plan around that.

Parked vehicles heat up quickly. The RSPCA points out that when it is 22°C outside, the inside of a car can reach 47°C within an hour. That is a useful figure to quote to any driver who thinks a shaded space is good enough. It surprises most people. Share the figure.

Never leave a child, an adult passenger or an animal in a stationary vehicle in warm weather. Not for two minutes, not with a window cracked open. This is a fixed rule, and it belongs in every driver handbook and every volunteer induction. There is no safe version of this.

Practical Steps For Passenger Journeys

• Precool the vehicle. Run the air conditioning or open doors before the first pickup so nobody boards into trapped heat.
• Check metal and vinyl surfaces. Wheelchair frames, seatbelt buckles and grab rails can get hot enough to burn thin skin.
• Fit rear sunshades. Passengers cannot move out of direct sun the way a driver can.
• Carry cold water and cups. Include extra for delays. Dehydration affects older passengers quickly.
• Protect medicines. Insulin and some other medicines degrade in heat, so never leave them on a sunny seat.
• Shorten the wait. Tighten pickup windows on hot days rather than asking people to stand outside longer.

Ventilation beats a blast of cold air. Open the windows first to push hot air out, then switch to air conditioning. Aim vents upward so cool air circulates instead of blowing straight onto one passenger, which older people often find uncomfortable. Small adjustments make a large difference. Ask, rather than guess.

Carers and family members can help if you tell them what to expect. A short message about likely pickup time, water on board and how long the journey should take reduces anxiety. It also cuts the number of calls into the office on a hot day. It costs one text message.

For NHS transport teams the stakes are higher. Patients travelling for dialysis, oncology or day surgery are often already dehydrated or fasting, so a long wait in a warm vehicle carries real clinical risk. Build extra care into those routes rather than treating them like any other job. Flag them on the run sheet.

What Do Hay Fever And Medicine Mean For Drivers?

They mean a legal duty, not just discomfort. It is an offence under the Road Traffic Act 1988 to drive while unfit through drink or drugs, and GOV.UK confirms this covers prescribed and over the counter medicines as well as illegal ones. The label on the packet is the place to start.

Hay fever tablets are the usual culprit. Older sedating antihistamines cause obvious drowsiness. Even products labelled non drowsy affect some people, and NHS guidance on cetirizine tells anyone who feels sleepy not to drive or use machinery. Reaction times slip before people notice. That is what makes it risky. Ask a pharmacist.

GEM Motoring Assist puts hay fever prevalence at around 26% of UK adults and warns that the same road traffic laws apply to medicines as to illegal drugs. For a service running dozens of drivers, that is a meaningful slice of the rota. Plan for it rather than hoping. Raise it at induction.

Reducing The Risk

• Read the label every time. Formulations change and brands vary.
• Try a new medicine on a non driving day. You will know how it affects you before it matters.
• Ask a pharmacist for a non sedating option. Free, quick and often solves the problem entirely.
• Replace the cabin filter. A clean pollen filter cuts how much gets into the vehicle in the first place.
• Keep windows closed on high pollen routes. Rural lanes and grass verges are the worst offenders.
• Stand down if you feel impaired. A driver who calls in is protecting everyone, including the organisation.

Managers and HR teams have a part to play here. If a driver fears losing shifts for reporting drowsiness, they will drive anyway. Make it clear that standing down is the expected response, and cover the point in your summer driver briefing. Culture matters more than policy wording. Say it out loud.

A sneeze at 60mph closes your eyes for roughly twenty metres.

How Should You Plan Routes And Breaks In Summer?

Travel earlier, build in slack and plan the breaks before you set off. Summer adds roadworks, tourist traffic, festival closures and school holiday patterns to the same road network. Journey times that work in February fall apart in August. Rebuild your timings for the season rather than reusing winter ones.

The Highway Code is specific about rest. Rule 91 recommends a minimum break of at least 15 minutes after every two hours of driving, and advises against long journeys between midnight and 6am. That applies to volunteers and paid staff equally. Schedule the breaks in. Do not leave it to the driver.

What Changes In Summer

• Roadworks peak. Most resurfacing happens in dry weather, so temporary limits and loose chippings are common.
• School holidays reshape demand. Home to school and SEND routes pause while day trips, respite runs and social outings rise.
• Rural and coastal routes fill up. Narrow lanes, tractors, caravans and cyclists all at once.
• Signal drops out. Sat nav can mislead on country lanes, so carry a paper backup for unfamiliar routes.
• Staff availability dips. Volunteer and staff holidays reduce cover in exactly the weeks demand shifts.

Loose chippings need their own habit. Drop back, cut your speed and avoid overtaking through freshly dressed sections. Stones thrown up by the vehicle in front crack windscreens and headlamps, and a cracked screen takes a vehicle off the road. Repairs cost far more than the delay. Just drop back.

Good route planning pays for itself here. Grouping pickups sensibly, spotting a route that has been diverted and reassigning a job when a driver drops out all take minutes rather than hours when the information sits in one place. Doing it on paper in July is slow and error prone.

Demand responsive services face the sharpest version of this. Bookings move, cancellations spike in extreme heat and drivers are away, so DRT software that lets you reschedule quickly is worth more in August than in most other months. Flexibility is the whole point of the model, and heat tests it.

Longer routes also cost more. Volunteer mileage is reimbursed at the HMRC approved rate, which rose to 55p per mile for the first 10,000 miles from 6 April 2026. Detours now hit budgets harder than they used to. Track the extra miles rather than absorbing them quietly. Report them monthly.

That matters for anyone holding a budget. Local councils, NHS trusts and central government contracts all price transport on assumed mileage, so a summer of diversions can quietly erode a margin that looked comfortable in the spring. Worth flagging early with whoever signs off the contract. Surprises land badly in October.

What Summer Driving Tips Apply To Electric Vehicles?

Warm weather is generally kind to range, but extreme heat is not. Battery chemistry works well in mild conditions. Push past the low thirties and thermal management starts drawing power, charging can slow and range predictions become less reliable. Range figures quoted in spring rarely hold in a heatwave. Check your own data.

• Precondition while plugged in. Cool the cabin using mains power, not battery, before you set off.
• Charge to 80% for daily use. Better for long term battery health, particularly in sustained heat.
• Expect slower rapid charging. Chargers and packs both throttle when hot, so allow longer at the stop.
• Plan charging around demand. Holiday routes and coastal chargers get busy. Check availability before you rely on a single site.
• Watch tyre pressures. Electric vehicles are heavier, so heat and load combine faster.
• Park in shade and use a sunshade. Reduces the cooling load when you return to the vehicle.
• Keep cables out of direct sun. Heat degrades insulation over time.
• Install software updates. Manufacturers regularly improve thermal management and charging behaviour.

Air conditioning is the biggest single draw on a hot day. Precooling on mains power removes most of that cost, so build it into the depot routine rather than leaving it to individual drivers to remember on a busy morning. It is a depot habit, not a driver decision. Make it routine.

If you are still building your charging plan, our guide to EV charging explained covers connector types and speeds. Fleet leads should also record real world summer range per vehicle. Manufacturer figures are a starting point, not a planning tool for August. Log it monthly. Real numbers beat brochure figures every time.

What Should A Summer Emergency Kit Hold?

Water, shade and a way to call for help. A summer breakdown looks less dramatic than a winter one, but standing on a hot verge for an hour is genuinely dangerous for an older or unwell passenger. Pack for the wait, not the repair. Most of the risk is the wait.

• Bottled water. More than you think you need, plus cups for passengers.
• Reflective windscreen sunshade. Keeps a stationary vehicle usable while you wait.
• Sun cream and sun hats. Passengers may be standing in the open for a long time.
• First aid kit. Check the contents and expiry dates each season.
• Charged power bank and cable. A flat phone turns a delay into an emergency.
• High visibility vests and warning triangle. Standing beside a road is the real risk in a breakdown.
• Tyre repair kit or spare. Blowouts are the top summer fault.
• Paper map and printed contact list. For when signal fails on a rural lane.
• Snacks. Useful for diabetic passengers and long delays.

Check breakdown cover before the season starts, not during it. Confirm it covers the vehicle type, the number of passengers and onward travel. Many policies recover the vehicle but leave you to arrange transport for the people in it. Ask the question in writing so you have the answer. Do it in May.

Facilities and operations managers should also review where vehicles sit overnight. Shaded or covered parking lowers cabin temperatures the next morning, protects interiors and reduces the load on air conditioning for the whole first run. A covered bay is cheaper than a new compressor. It pays back over a season.

How Do Transport Teams Build Summer Readiness Into Daily Work?

Turn the advice into a routine that runs without anyone remembering it. Good driving tips fail when they live in an email nobody reopens. The organisations that cope best with heat have written it into checks, briefings and escalation steps. Routine beats good intentions. Write it into the paperwork once.

A Practical Summer Readiness Plan

• Add a hot weather section to your daily vehicle check. Coolant, air conditioning, water stock and sunshades.
• Write a heat threshold into policy. Decide at what point you shorten waits, add water stops or postpone non urgent journeys.
• Monitor heat health alerts. Nominate someone to check them and act, rather than assuming everyone has seen the forecast.
• Flag vulnerable passengers. Record who needs priority in heat so it shows on the run sheet automatically.
• Brief drivers and volunteers each June. Cover medication, footwear, glare and passenger welfare in one short session.
• Plan for reduced cover. Map holiday absence against expected demand before it bites.

Trustees and charity CEOs should see this as a governance question. Passenger welfare in extreme heat sits inside your duty of care, and a documented plan is much easier to defend than a set of informal habits held in one coordinator's head. Boards should ask to see it once a year.

Councillors and local council officers reviewing services can ask a simple question. What happens to this route during an amber heat alert? A clear answer indicates a well run service. The same question works for SEND routes, patient transport and community car schemes. Ask it at contract review. The answer tells you plenty.

Public sector buyers are increasingly asking the same thing during procurement. Evidence of a heat plan, driver briefings and passenger welfare records is becoming a differentiator rather than a nice extra. Building that evidence now is easier than assembling it during a tender window. It also protects passengers. Start with one page.

Systems help because they remove memory from the equation. When vehicle checks, passenger needs, driver availability and live locations sit in one place, a hot week becomes a scheduling exercise instead of a scramble. That is the practical value of transport management software. One place, one version. One answer.

Summer will not get cooler. Plan for it once and reuse the plan.

For the rest of the year, see our autumn driving tips and winter driving tips. The seasons change but the underlying habit does not, which is checking the vehicle and thinking about the passenger before you set off. The habits carry over. Read all three before each season changes.

Frequently Asked Questions

What Are The Most Important Summer Driving Tips?

Check coolant and tyres before you set off, keep the vehicle well ventilated, and carry more water than you think you need. Slow down or stop if sun glare dazzles you, as Rule 237 of the Highway Code requires. Never leave anyone in a parked vehicle.

Does Hot Weather Really Cause More Breakdowns?

Yes. During the 2026 heatwaves the RAC reported daily call outs running roughly 20% above normal, and the AA attended 54% more overheating breakdowns in a single week. Tyres, batteries and cooling systems account for most of the increase.

Should Tyre Pressure Be Higher Or Lower In Summer?

Set it to the manufacturer's figure, measured when the tyres are cold. Do not reduce pressure because air expands in heat. Underinflation causes more heat buildup and is a common cause of blowouts. Increase pressure only if the handbook specifies a higher figure for a full load.

Can You Be Fined For Wearing Flip Flops While Driving?

Flip flops are not illegal in themselves. However Rule 97 of the Highway Code requires that clothing and footwear do not stop you using the controls properly. If footwear contributes to poor control, you can face a penalty for careless driving.

Is It Legal To Drive After Taking Hay Fever Tablets?

It is legal unless the medicine makes you unfit to drive. Driving while impaired by any drug, including tablets bought over the counter, is an offence under the Road Traffic Act 1988. Read the label, and ask a pharmacist for a non sedating option if needed.

How Hot Does A Parked Car Get In The UK?

Far hotter than the outside air. The RSPCA states that at 22°C outside, the inside of a car can reach 47°C within an hour. Shade and a partly open window make little difference, which is why nobody should be left in a stationary vehicle.

Do Electric Vehicles Lose Range In Hot Weather?

Mild warmth usually improves range compared with winter. Extreme heat reduces it, because battery cooling and air conditioning both draw power. Rapid charging can also slow when the pack or charger is hot, so allow extra time at charging stops.

Summer Driving Tips In Summary

Summer asks more of vehicles, drivers and passengers than most people expect. Heat causes breakdowns, glare hides hazards, medicine affects alertness and parked vehicles become dangerous within minutes. None of that is complicated. It just needs to be planned rather than assumed. That is the whole message here. Nothing exotic.

Start with the vehicle. Coolant, tyres, battery and air conditioning. Then the driver, covering glare, footwear, medication and breaks. Then the passenger, covering waiting time, water, shade and priority for anyone frail or unwell. Work through the three in order and most problems disappear before they start. It takes one team meeting.

If you run a service rather than a single vehicle, write it down once. A short hot weather annex to your existing procedures turns these summer driving tips into something your team actually follows, every year, without a reminder. Review it each May and it will stay useful. Year after year.

Sources

• The Highway Code, driving in adverse weather conditions, rules 226 to 237, GOV.UK
• The Highway Code, rules for drivers and motorcyclists, rules 89 to 102, GOV.UK
• UKHSA heat health alerts across England, UK Health Security Agency
• Drugs and driving, the law, GOV.UK
• Business travel mileage, rules for tax, HM Revenue and Customs
• Breaking down in a heatwave can be far more than just an inconvenience, RAC Media Centre
• Record breaking temperatures drive increase in breakdowns, Fleet News
• Tyre tread depth, UK law and tyre safety checks, RAC
• Dogs die in hot cars, RSPCA
• Heat alerts explained, Met Office