There's a particular kind of UK summer drive that every parent knows. The weather is actually nice for once, everyone set off in good spirits, and then about 40 minutes in, the back seat starts to overheat. The kids are hot, the air conditioning is either too cold at the front or not reaching the back at all, and someone has drunk all their water within the first ten miles.

Keeping children comfortable in a hot car is genuinely one of the challenges of UK summer travel. Here's what actually helps.

Timing Your Journey

This is the single biggest thing you can do. Cars heat up fastest between about 11am and 4pm, and roads are busiest then too. If you can leave before 9am or after 5pm, you'll have a cooler car and less traffic. Even on a trip where you can't avoid the midday heat entirely, splitting the journey with a stop during the hottest part of the afternoon is worth it.

On school holidays especially, early morning departures are a game changer. Kids tend to sleep in the car in the morning, it's cooler, and you arrive before the worst of the holiday traffic.

Cooling the Car Before You Set Off

  • Open all four doors for two minutes before getting the children in
  • Run the air conditioning on maximum for a couple of minutes with the doors open, then close up
  • Check seat belt buckles and car seat metal parts before buckling children in -- these can get very hot in direct sun
  • Park in shade wherever possible, or use a windscreen sun shade to reduce how much the interior heats up

Sun Blinds for the Rear Windows

If you don't already have rear window sun blinds, this is one of the best investments you can make before summer. Direct sunlight through the side windows hits children sitting in rear-facing or forward-facing car seats squarely, and it makes a significant difference to how hot they get.

Suction cup blinds are easy to fit and remove. UV-rated options add sun protection as well as shade. For longer journeys, they're worth every penny.

☀️ Heat safety note: Never leave children in a parked car in warm weather, even for a short time. Car interiors heat up faster than most people expect, and temperatures can become dangerous within minutes on a warm UK summer day.

Keeping Drinks Cold

Cold water is one of the most effective tools for keeping children comfortable in a hot car. The problem is that drinks warm up quickly, particularly in bottles left on seat pockets or in cup holders that get direct sunlight.

The CheekyBoo Car Seat Organiser solves this with insulated drinks holders that keep cold drinks cold considerably longer than a standard cup holder. The drinks stay within reach of your child independently, which means they can help themselves when they need to rather than waiting for you to pass something back. On summer journeys, having cold water that's actually cold and accessible from the back seat makes a noticeable difference.

For longer summer trips, freezing a water bottle overnight and using it as a cool pack in the organiser works well -- it'll be icy cold at the start of the journey and pleasantly cool by the time you arrive.

Cooling Towels and Other Extras

Cooling towels are compact, reusable, and genuinely useful for overheated children. They activate with water and stay cool for a couple of hours. Keep one in the car kit and wet it at a service station if needed.

A small battery-operated clip-on fan that attaches to a headrest is another option parents swear by for longer journeys. They won't cool the whole car, but they make a big difference for a specific seat.

What to Wear

  • Loose, light-coloured cotton clothing -- absorbs less heat than dark colours
  • Avoid synthetic fabrics in warm weather; they trap heat and don't breathe
  • Sandals are fine at the destination, but have shoes or socks accessible for when the air conditioning kicks in too hard
  • A sun hat for when you arrive, stored in the organiser rather than the boot
CheekyBoo Car Seat Organiser with insulated drinks holders

CheekyBoo Car Seat Organiser

Insulated drinks holders that keep cold drinks cold, snack pockets, tablet pocket and 8 compartments in total. Everything your child needs within reach on a hot summer drive. £16.99, Amazon's Choice, 822 reviews.

Shop on Amazon UK →

Frequently Asked Questions

Open all four doors for a couple of minutes before putting children in the car. This lets the hot air escape quickly. If the car has been parked in direct sun, the steering wheel and seat belt buckles can be extremely hot, so check these before buckling children in. Running the air conditioning on full for two to three minutes with the doors open cools the interior faster than with the doors shut.
Yes, car sun blinds are one of the most useful and underrated car accessories for families. They block direct sunlight on the rear windows, which significantly reduces the temperature on children's skin and makes a real difference on south-facing journeys. Look for ones that attach with suction cups and are easy to remove when parking, or retractable versions that fit inside the window frame. UV-protective blinds add an extra layer of sun safety.
Light, breathable fabrics like cotton or linen are best for car journeys in summer. Avoid dark colours that absorb heat. Loose-fitting clothing is more comfortable for children strapped into car seats. If children are wearing sandals, they may want shoes on for longer journeys as feet can get cold from air conditioning. Always keep a light cardigan or layer accessible for the same reason.