Weather, Grip & Skids

Your tyres only ever have a limited amount of grip to share between accelerating, braking and steering — and weather decides how much of it is actually available. Learn what rain, ice, fog and wind each do, and the calm response that covers all of them.

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⏱️ About 12 min

Every kind of weather takes grip away from your tyres in a different way — a slicker surface, a film of water your tyres can't push aside fast enough, or simply less warning of what's ahead. Learn what each one is actually doing to the car, and the same handful of habits will carry you through all of them.

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The big idea: Grip isn't fixed — rain, ice, snow, fog and wind each remove it, or the warning you'd normally get, in a different way. The response is almost always the same: slow down earlier than you think you need to, and make every steering, braking and accelerating input gentler than usual.

🎯 By the end, you'll be able to

Explain why the first rain after a dry spell is often the most slippery moment on the road
Respond correctly if a tyre begins to aquaplane
Adjust your inputs for ice and snow, and know when to use — and switch off — fog lights
Recognise the extra risk strong wind poses on exposed roads and to high-sided vehicles

📎 Helpful to know first

Stopping Distances

Rain: less grip, and least of all right at the start

Rain reduces grip because a layer of water sits between your tyres and the road surface, cutting the friction that steering, braking and acceleration all depend on. Counter-intuitively, the road is often at its most slippery not during the heaviest part of a downpour, but in the first few minutes after rain starts — especially after a long dry spell. Oil, rubber and dust that have built up on dry tarmac mix with that first rain before it washes away, and that mixture can be slicker than the wet road you'd find later in the same shower, once it's rinsed clean.

The practical habit: slow down and open up your following distance as soon as rain starts, rather than waiting to see how bad conditions get.

This warning triangle marks a stretch of road that may be more slippery than usual — not just in the rain, but wherever loose surface material, oil, or worn road markings reduce grip.

⚠️ Aquaplaning: ease off, don't brake

When water arrives on the road faster than your tyre tread can channel it away — deep standing water, high speed, or worn tread — a wedge of water can lift part or all of a tyre off the road surface. This is aquaplaning: the tyre is riding on water instead of gripping tarmac, so steering, braking and accelerating all stop responding normally, and the car can feel like it's floating.

Ease off the accelerator smoothly. Don't brake hard — braking hard can lock a tyre that suddenly regains grip, pulling the car sideways.
Hold the wheel steady, aimed the direction you want to go. Avoid any sudden or sharp steering.
Wait it out. Contact with the road usually returns within a second or two — once it does, ease back to your normal speed gradually.

Ice and snow: gentle everything

On ice or snow, grip is far more limited than even a wet road provides, so every input needs to be smoother and more gradual than usual: gentle acceleration to avoid wheelspin, gentle and early braking rather than a late, hard press, and gentle, deliberate steering. Pulling away in a higher gear than you'd normally use can help the driven wheels find grip without spinning. Above all, give yourself far more space than usual — both your following distance and your view ahead — because everything, including stopping, takes longer.

Fog: dipped headlights, and fog lights only when you need them

In fog, use dipped headlights so you can be seen as well as see. Add front or rear fog lights only once visibility drops to around 100 metres or less — roughly the distance you can judge between roadside lamp posts on a lit road. Fog lights are much brighter than ordinary lights, so switch them off again as soon as visibility improves: left on in clearer conditions, they can dazzle drivers behind you and make it harder for them to see your brake lights when you actually need to stop.

Strong wind: watch exposed stretches and high-sided vehicles

Wind can push a car sideways out of its lane, and the risk is greatest on exposed stretches of road — high bridges, open countryside, and gaps between larger vehicles where a gust suddenly hits you after being briefly sheltered. High-sided vehicles — vans, lorries, buses, and cars towing a caravan or trailer — catch far more wind and are especially vulnerable to being pushed off line. Motorcyclists and cyclists can be blown well across a lane by a single gust, so give them extra room. If you're overtaking a high-sided vehicle in windy conditions, be ready for a sudden gust as you clear its shelter and reach open air again.

Check your understanding

1. When is a road often at its most slippery from rain?

Oil, rubber and dust built up on dry tarmac mix with the first rain before it washes away, which can make the road slicker at the start of a shower than later in it.

2. If your car begins to aquaplane, what should you do?

Braking hard risks locking a tyre the instant it regains grip, pulling the car sideways. Easing off and holding a steady line lets the tyre reconnect safely.

3. When should you switch on front or rear fog lights?

Fog lights are for genuinely poor visibility, roughly 100 metres or less. Switch them off again as soon as visibility improves, since they can dazzle following drivers.

4. Strong wind is a particular risk to:

High-sided vehicles (vans, lorries, buses, towing outfits) catch more wind, and any vehicle is more exposed on open bridges or countryside, or just after passing a larger vehicle.

✅ Key takeaways

Rain cuts grip, and the first few minutes of rain after a dry spell are often the most slippery moment on the road.
If a tyre aquaplanes: ease off the accelerator, hold the wheel steady, don't brake hard — wait for grip to return.
On ice or snow, make every input gentler and earlier: acceleration, braking, and steering alike.
Use dipped headlights in fog; add fog lights only below about 100 m visibility, and switch them off once visibility improves.
Strong wind is riskiest on exposed roads and for high-sided vehicles — watch for sudden gusts when overtaking one.

➡️ Weather changes the whole road at once. Next, three specific stretches of road — contraflows, tunnels, and fords — that each ask you to change just one habit.

Frequently asked questions

Why is the first rain after a dry spell so slippery?

Dry roads build up a thin film of oil, rubber and dust between rainfalls. The first rain mixes with that film before it washes away, which can make the surface slicker than the same road further into the same shower.

What should I do if my car aquaplanes?

Ease off the accelerator smoothly, hold the steering wheel steady in the direction you want to go, and avoid braking hard. Contact with the road usually returns within a second or two.

When should I use fog lights, and when should I turn them off?

Use front or rear fog lights only once visibility drops to around 100 metres or less. Switch them off as soon as visibility improves — left on in clearer conditions they can dazzle drivers behind you and hide your brake lights.

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Independent educational content — not affiliated with, endorsed by, or connected to the DVSA, DVLA, or any government body. This is study material, not legal advice; always confirm current rules in the official Highway Code.